update / deprecate versions, add py-python-dateutils dependency (#1)

- Add [email protected]; v2.8 and newer require dependency [email protected]: -- see here.
- Deprecate [email protected] per communication with uwtools team. Deprecation policy: "latest three minor releases"

Author: rickgrubin-noaa

repos/spack_repo/builtin/packages/uwtools/package.py

@@ -23,10 +23,14 @@ class Uwtools(PythonPackage):
 
     license("GPL-2.0-or-later", checked_by="WeirAE")
 
-    version("2.8.1", sha256="ddd306a4605f0f03e3c7b4f5d6728f9f430791effe90c2428c3e50a7aea1c165")
+    # Latest three minor releases per depreciation policy
+    version("2.8.2", sha256="634f7fbc33cd9439f43df00c1d904266b9c51b3f386c2141c26c1229d4d95a34")
     version("2.7.2", sha256="56816d543664792258bfa7dfb7e4cc66f794959dc92dc3710021f40a2b8571a4")
     version("2.6.2", sha256="d0922ddd2b3bdbeb925c2e4694f929f3e966145d2929e74ab9f9c9ecd27b674a")
-    version("2.5.1", sha256="f389f63195492196c8009d5843a3861ad350b5fd1cea1fdb8a6bfdc7cbfd660f")
+    version(
+            "2.5.1",
+            sha256="f389f63195492196c8009d5843a3861ad350b5fd1cea1fdb8a6bfdc7cbfd660f",
+            deprecated = True)
 
     depends_on("py-pip", type="build")
     # Maximum Python version limited here for compatibility with the JCSDA unified environment
@@ -42,7 +46,7 @@ class Uwtools(PythonPackage):
     depends_on("[email protected]", when="@2.7")
     depends_on("[email protected]:5.4", when="@2.8")
     depends_on("[email protected]", when="@:2.6")
-    depends_on("[email protected]", when="@2.8:")
+    depends_on("[email protected]:", when="@2.8:")
     depends_on("[email protected]")
     depends_on("[email protected]", when="@2.6:")