compat!: Drop python 3.7 and 3.8 (#363)

tmuxp: tmux-python/tmuxp#759

Bug fixes and security releases go to https://github.com/tmux-python/libtmux/tree/v0.11.x

Author: tony

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.10"]
+        python-version: ["3.9", "3.10"]
         tmux-version: ["2.6", "2.7", "2.8", "3.0a", "3.1b", "3.2a", "master"]
     steps:
       - uses: actions/checkout@v1

.python-version

@@ -1 +1 @@
-3.10.1 3.9.9 3.8.11 3.7.12
+3.10.1 3.9.9

.tool-versions

@@ -1,2 +1,2 @@
 poetry 1.1.12
-python 3.10.1 3.9.9 3.8.11 3.7.12
+python 3.10.1 3.9.9

README.md

@@ -190,7 +190,7 @@ See donation options at <https://git-pull.com/support.html>.
 # Project details
 
 - tmux support: 1.8, 1.9a, 2.0 - 2.9, 3.0
-- python support: >= 3.7, pypy, pypy3
+- python support: >= 3.9, pypy, pypy3
 - Source: <https://github.com/tmux-python/libtmux>
 - Docs: <https://libtmux.git-pull.com>
 - API: <https://libtmux.git-pull.com/api.html>