diff --git a/poetry.lock b/poetry.lock
index 29b383e..a7eb12f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -167,15 +167,20 @@ optional = false
 python-versions = ">=3.6"
 
 [package.dependencies]
+fsspec = {version = ">=0.6.0", optional = true, markers = "extra == \"dataframe\""}
+numpy = {version = ">=1.13.0", optional = true, markers = "extra == \"dataframe\""}
+pandas = {version = ">=0.23.0", optional = true, markers = "extra == \"dataframe\""}
+partd = {version = ">=0.3.10", optional = true, markers = "extra == \"dataframe\""}
 pyyaml = "*"
+toolz = {version = ">=0.8.2", optional = true, markers = "extra == \"dataframe\""}
 
 [package.extras]
 array = ["numpy (>=1.13.0)", "toolz (>=0.8.2)"]
 bag = ["cloudpickle (>=0.2.2)", "fsspec (>=0.6.0)", "toolz (>=0.8.2)", "partd (>=0.3.10)"]
-complete = ["bokeh (>=1.0.0,<2.0.0 || >2.0.0)", "cloudpickle (>=0.2.2)", "distributed (>=2.0)", "fsspec (>=0.6.0)", "numpy (>=1.13.0)", "pandas (>=0.23.0)", "partd (>=0.3.10)", "toolz (>=0.8.2)"]
+complete = ["bokeh (>=1.0.0,!=2.0.0)", "cloudpickle (>=0.2.2)", "distributed (>=2.0)", "fsspec (>=0.6.0)", "numpy (>=1.13.0)", "pandas (>=0.23.0)", "partd (>=0.3.10)", "toolz (>=0.8.2)"]
 dataframe = ["numpy (>=1.13.0)", "pandas (>=0.23.0)", "toolz (>=0.8.2)", "partd (>=0.3.10)", "fsspec (>=0.6.0)"]
 delayed = ["cloudpickle (>=0.2.2)", "toolz (>=0.8.2)"]
-diagnostics = ["bokeh (>=1.0.0,<2.0.0 || >2.0.0)"]
+diagnostics = ["bokeh (>=1.0.0,!=2.0.0)"]
 distributed = ["distributed (>=2.0)"]
 
 [[package]]
@@ -223,6 +228,31 @@ category = "main"
 optional = false
 python-versions = ">=2.7"
 
+[[package]]
+name = "fsspec"
+version = "2021.5.0"
+description = "File-system specification"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+abfs = ["adlfs"]
+adl = ["adlfs"]
+dask = ["dask", "distributed"]
+dropbox = ["dropboxdrivefs", "requests", "dropbox"]
+entrypoints = ["importlib-metadata"]
+gcs = ["gcsfs"]
+git = ["pygit2"]
+github = ["requests"]
+gs = ["gcsfs"]
+hdfs = ["pyarrow (>=1)"]
+http = ["requests", "aiohttp"]
+s3 = ["s3fs"]
+sftp = ["paramiko"]
+smb = ["smbprotocol"]
+ssh = ["paramiko"]
+
 [[package]]
 name = "heapdict"
 version = "1.0.1"
@@ -339,7 +369,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 parso = ">=0.7.0,<0.8.0"
 
 [package.extras]
-qa = ["flake8 (3.7.9)"]
+qa = ["flake8 (==3.7.9)"]
 testing = ["Django (<3.1)", "colorama", "docopt", "pytest (>=3.9.0,<5.0.0)"]
 
 [[package]]
@@ -472,6 +502,14 @@ category = "main"
 optional = false
 python-versions = ">=3.6"
 
+[[package]]
+name = "locket"
+version = "0.2.1"
+description = "File-based locks for Python for Linux and Windows"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
 [[package]]
 name = "markupsafe"
 version = "1.1.1"
@@ -565,11 +603,11 @@ testpath = "*"
 traitlets = ">=4.2"
 
 [package.extras]
-all = ["pytest", "pytest-cov", "pytest-dependency", "ipykernel", "ipywidgets (>=7)", "pyppeteer (0.2.2)", "tornado (>=4.0)", "sphinx (>=1.5.1)", "sphinx-rtd-theme", "nbsphinx (>=0.2.12)", "ipython"]
+all = ["pytest", "pytest-cov", "pytest-dependency", "ipykernel", "ipywidgets (>=7)", "pyppeteer (==0.2.2)", "tornado (>=4.0)", "sphinx (>=1.5.1)", "sphinx-rtd-theme", "nbsphinx (>=0.2.12)", "ipython"]
 docs = ["sphinx (>=1.5.1)", "sphinx-rtd-theme", "nbsphinx (>=0.2.12)", "ipython"]
 serve = ["tornado (>=4.0)"]
-test = ["pytest", "pytest-cov", "pytest-dependency", "ipykernel", "ipywidgets (>=7)", "pyppeteer (0.2.2)"]
-webpdf = ["pyppeteer (0.2.2)"]
+test = ["pytest", "pytest-cov", "pytest-dependency", "ipykernel", "ipywidgets (>=7)", "pyppeteer (==0.2.2)"]
+webpdf = ["pyppeteer (==0.2.2)"]
 
 [[package]]
 name = "nbformat"
@@ -692,6 +730,21 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 [package.extras]
 testing = ["docopt", "pytest (>=3.0.7)"]
 
+[[package]]
+name = "partd"
+version = "1.2.0"
+description = "Appendable key-value storage"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
+[package.dependencies]
+locket = "*"
+toolz = "*"
+
+[package.extras]
+complete = ["numpy (>=1.9.0)", "pandas (>=0.19.0)", "pyzmq", "blosc"]
+
 [[package]]
 name = "pathspec"
 version = "0.8.0"
@@ -915,7 +968,7 @@ python-versions = "*"
 
 [[package]]
 name = "requests"
-version = "2.24.0"
+version = "2.25.1"
 description = "Python HTTP for Humans."
 category = "main"
 optional = false
@@ -923,13 +976,13 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
-chardet = ">=3.0.2,<4"
+chardet = ">=3.0.2,<5"
 idna = ">=2.5,<3"
-urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
+urllib3 = ">=1.21.1,<1.27"
 
 [package.extras]
 security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
 
 [[package]]
 name = "retrying"
@@ -1158,7 +1211,7 @@ plot = ["pandas", "matplotlib", "datashader", "bokeh", "holoviews", "colorcet"]
 
 [[package]]
 name = "urllib3"
-version = "1.25.11"
+version = "1.26.5"
 description = "HTTP library with thread-safe connection pooling, file post, and more."
 category = "main"
 optional = false
@@ -1167,7 +1220,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
 [package.extras]
 brotli = ["brotlipy (>=0.6.0)"]
 secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [[package]]
 name = "wcwidth"
@@ -1238,6 +1291,12 @@ argon2-cffi = [
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     {file = "argon2_cffi-20.1.0-cp38-cp38-win32.whl", hash = "sha256:77e909cc756ef81d6abb60524d259d959bab384832f0c651ed7dcb6e5ccdbb78"},
     {file = "argon2_cffi-20.1.0-cp38-cp38-win_amd64.whl", hash = "sha256:9dfd5197852530294ecb5795c97a823839258dfd5eb9420233c7cfedec2058f2"},
+    {file = "argon2_cffi-20.1.0-cp39-cp39-win32.whl", hash = "sha256:e2db6e85c057c16d0bd3b4d2b04f270a7467c147381e8fd73cbbe5bc719832be"},
+    {file = "argon2_cffi-20.1.0-cp39-cp39-win_amd64.whl", hash = "sha256:8a84934bd818e14a17943de8099d41160da4a336bcc699bb4c394bbb9b94bd32"},
+    {file = "argon2_cffi-20.1.0-pp36-pypy36_pp73-macosx_10_7_x86_64.whl", hash = "sha256:b94042e5dcaa5d08cf104a54bfae614be502c6f44c9c89ad1535b2ebdaacbd4c"},
+    {file = "argon2_cffi-20.1.0-pp36-pypy36_pp73-win32.whl", hash = "sha256:8282b84ceb46b5b75c3a882b28856b8cd7e647ac71995e71b6705ec06fc232c3"},
+    {file = "argon2_cffi-20.1.0-pp37-pypy37_pp73-macosx_10_7_x86_64.whl", hash = "sha256:3aa804c0e52f208973845e8b10c70d8957c9e5a666f702793256242e9167c4e0"},
+    {file = "argon2_cffi-20.1.0-pp37-pypy37_pp73-win_amd64.whl", hash = "sha256:36320372133a003374ef4275fbfce78b7ab581440dfca9f9471be3dd9a522428"},
 ]
 async-generator = [
     {file = "async_generator-1.10-py3-none-any.whl", hash = "sha256:01c7bf666359b4967d2cda0000cc2e4af16a0ae098cbffcb8472fb9e8ad6585b"},
@@ -1340,6 +1399,10 @@ entrypoints = [
     {file = "entrypoints-0.3-py2.py3-none-any.whl", hash = "sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19"},
     {file = "entrypoints-0.3.tar.gz", hash = "sha256:c70dd71abe5a8c85e55e12c19bd91ccfeec11a6e99044204511f9ed547d48451"},
 ]
+fsspec = [
+    {file = "fsspec-2021.5.0-py3-none-any.whl", hash = "sha256:a08daa28ecb98544350d62f8307a7678e410c4b5245e04d14fcf4a3f13e959a7"},
+    {file = "fsspec-2021.5.0.tar.gz", hash = "sha256:30064d89b00c6acfe5d8e027b6c0ef3df25ca17fd1d5cad2e8208c9aa5300f8d"},
+]
 heapdict = [
     {file = "HeapDict-1.0.1-py3-none-any.whl", hash = "sha256:6065f90933ab1bb7e50db403b90cab653c853690c5992e69294c2de2b253fc92"},
     {file = "HeapDict-1.0.1.tar.gz", hash = "sha256:8495f57b3e03d8e46d5f1b2cc62ca881aca392fd5cc048dc0aa2e1a6d23ecdb6"},
@@ -1410,29 +1473,20 @@ kiwisolver = [
     {file = "kiwisolver-1.3.0-cp36-cp36m-manylinux2010_i686.whl", hash = "sha256:878af7bec1563f1a88bb38ed8b118828ad0dc22101230560083c102c043aa5cc"},
     {file = "kiwisolver-1.3.0-cp36-cp36m-manylinux2010_x86_64.whl", hash = "sha256:8be5c0a742116d32bdce4794134ed88bb520e7ace20deb1d00797a0ac36a33d0"},
     {file = "kiwisolver-1.3.0-cp36-cp36m-manylinux2014_aarch64.whl", hash = "sha256:baea709cd4b2547294c5dd541099811bbf949def9bef25ed086d3084b0d48849"},
-    {file = "kiwisolver-1.3.0-cp36-cp36m-win32.whl", hash = "sha256:55ab9218cb1038ee7a74e9fcd653bd3687d017b8ff5f607f0d94caf6e130da7b"},
-    {file = "kiwisolver-1.3.0-cp36-cp36m-win_amd64.whl", hash = "sha256:75d21b446bbdfc7a4206117d0fcf423cfb3f6c5cc594caa984530499d5e097d6"},
     {file = "kiwisolver-1.3.0-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:b2afc07d87ad73350bcf573692f5fbc9720115c5c614e9b9cf0e93c667da5ecb"},
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     {file = "kiwisolver-1.3.0-pp36-pypy36_pp73-macosx_10_9_x86_64.whl", hash = "sha256:b755f2359cdc440ecc4825f718fbe982fe279379406fd26f59931e7574b4c3d1"},
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-    {file = "kiwisolver-1.3.0-pp36-pypy36_pp73-win32.whl", hash = "sha256:2f8a45855f3e72dbb5f46a4e24723c16fc106794d14162e85160c2fd659ae370"},
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 ]
 llvmlite = [
@@ -1453,6 +1507,10 @@ llvmlite = [
     {file = "llvmlite-0.34.0-cp38-cp38-win_amd64.whl", hash = "sha256:964f8f7a2184963cb3617d057c2382575953e488b7bb061b632ee014cfef110a"},
     {file = "llvmlite-0.34.0.tar.gz", hash = "sha256:f03ee0d19bca8f2fe922bb424a909d05c28411983b0c2bc58b020032a0d11f63"},
 ]
+locket = [
+    {file = "locket-0.2.1-py2.py3-none-any.whl", hash = "sha256:12b6ada59d1f50710bca9704dbadd3f447dbf8dac6664575c1281cadab8e6449"},
+    {file = "locket-0.2.1.tar.gz", hash = "sha256:3e1faba403619fe201552f083f1ecbf23f550941bc51985ac6ed4d02d25056dd"},
+]
 markupsafe = [
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@@ -1472,20 +1530,39 @@ markupsafe = [
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+    {file = "MarkupSafe-1.1.1-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:d53bc011414228441014aa71dbec320c66468c1030aae3a6e29778a3382d96e5"},
     {file = "MarkupSafe-1.1.1-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:00bc623926325b26bb9605ae9eae8a215691f33cae5df11ca5424f06f2d1f473"},
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