Bump PyEnv version to 3.9.7

Sjors · Sjors · commit 3117eb4ffde8 · 2021-11-11T15:41:46.000+01:00
HWI is compatible with Python 3.9.

Although 3.9.8 has been released, the most recent version of Python shipped
with PyEnv on homebrew (macOS) is 3.9.7

In order to test backwareds compatibility, the version is not changed elsewhere.
diff --git a/.cirrus.yml b/.cirrus.yml
@@ -214,6 +214,7 @@ dist_builder_task:
   container:
     dockerfile: contrib/build.Dockerfile
   build_script:
+    - pyenv install 3.9.7
     - contrib/build_bin.sh
     - contrib/build_dist.sh
     - find dist -type f -exec sha256sum {} \;
diff --git a/.python-version b/.python-version
@@ -1 +1 @@
-3.6.12
+3.9.7
