Drop support for Python 2.7

It's been end of life since January 2020.

.github/workflows/ci.yml

@@ -67,7 +67,7 @@ jobs:
     strategy:
       matrix:
         platform: [Win32, x64]
-        python-version: [2.7, 3.7]
+        python-version: [3.7]
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/release.yml

@@ -36,7 +36,7 @@ jobs:
     strategy:
       matrix:
         platform: [Win32, x64]
-        python-version: [2.7, 3.7]
+        python-version: [3.7]
 
     steps:
       - uses: actions/checkout@v2

README.md

@@ -14,7 +14,7 @@ Snapshot builds are available on [Artifactory](https://loot.jfrog.io/ui/repos/tr
 libloot-python-<short revision ID>-python<python version>-win<architecture>.zip
 ```
 
-For example `libloot-python-94de368-python2.7-win32.zip` was built using the revision with shortened commit ID `94de368`.
+For example `libloot-python-94de368-python3.7-win32.zip` was built using the revision with shortened commit ID `94de368`.
 
 ## Documentation
 

python/setup.py

@@ -79,11 +79,10 @@ setup(
     distclass=BinaryDistribution,
     classifiers=[
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: C++'
         'Operating System :: Microsoft :: Windows',
         'Intended Audience :: Developers',
     ],
-    python_requires='>=2.7',
+    python_requires='>=3.7',
 )