Stumble through using yarn to swap out the TS Version

Author: NullVoxPopuli

.github/workflows/ci-build.yml

@@ -44,9 +44,9 @@ jobs:
     strategy:
       matrix:
         tsVersion:
-          - 4.9
-          - 5.0
-          - 5.1
+          - '~4.9'
+          - '~5.0'
+          - '~5.1'
     steps:
       - uses: actions/checkout@v2
       - uses: volta-cli/action@v1