SNOW-706115: Unpin tox (#364)

Author: sfc-gh-aling

.github/workflows/build_test.yml

@@ -78,7 +78,7 @@ jobs:
     - name: Upgrade setuptools, pip and wheel
       run: python -m pip install -U setuptools pip wheel
     - name: Install tox
-      run: python -m pip install tox==4.0.0rc1
+      run: python -m pip install tox
     - name: List installed packages
       run: python -m pip freeze
     - name: Run tests

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-min_version = 4.0.0b2
+min_version = 4.0.0
 envlist = fix_lint,
           py{37,38,39,310}{,-pandas},
           coverage