Installs in Python 2, but fails with syntax error

[AndreasEisele]

Uses Python 3 syntax, invalid in Python 2:

$ pip install panlex_API
...
Successfully installed certifi-2018.11.29 chardet-3.0.4 idna-2.8 panlex-API-1.2.0 ratelimit-2.2.1 requests-2.21.0 urllib3-1.24.1
$ python
Python 2.7.5 (default, Jul 13 2018, 13:06:57)
>>> import panlex
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File ".../python2.7/site-packages/panlex.py", line 10
    def set_version(version:int):
                           ^
SyntaxError: invalid syntax
>>>

I could get rid of the problem by manually removing argument annotations in the source file, but I assume there should be an easier solution.