Use poetry v1.8.5 in CI for python 3.8 compatibility

Author: JWCook

.github/workflows/build.yml

@@ -38,10 +38,11 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - uses: snok/install-poetry@v1.4
         with:
+          version: 1.8.5
           virtualenvs-in-project: true
 
       # Start integration test databases
-      - uses: supercharge/mongodb-github-action@1.11.0
+      - uses: supercharge/mongodb-github-action@1.12.0
         with:
           mongodb-version: 4.4
       - uses: supercharge/redis-github-action@1.8.0