Merge pull request #12 from twosigma/test-latest-key-wins

added unit test

Author: daniel-shields

.github/workflows/coverage.yml

@@ -13,7 +13,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v1
       with:
-        python-version: "3.8"
+        python-version: "3.9"
         architecture: x64
     - name: Setup Graphviz
       uses: ts-graphviz/setup-graphviz@v1

.github/workflows/release.yml

@@ -9,7 +9,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v1
       with:
-        python-version: "3.8"
+        python-version: "3.9"
         architecture: x64
     - name: Setup Graphviz
       uses: ts-graphviz/setup-graphviz@v1

.github/workflows/tests.yml

@@ -10,9 +10,9 @@ jobs:
         - ubuntu-latest
         - windows-latest
         python:
-        - "3.6"
         - "3.7"
         - "3.8"
+        - "3.9"
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v1