master to main rename (#61)

.github/workflows/unit-tests.yml

@@ -2,20 +2,20 @@ name: "Run unit tests."
 on: # rebuild any PRs and main branch changes
   pull_request:
     branches:
-      - master
-      - 'releases/*'
+      - main
+      - "releases/*"
   push:
     branches:
-      - master
-      - 'releases/*'
+      - main
+      - "releases/*"
 
 jobs:
   build: # make sure build/ci works properly
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
-    
-    - name: Run L0 tests.
-      run: |
-        npm install
-        npm test
+      - uses: actions/checkout@v1
+
+      - name: Run L0 tests.
+        run: |
+          npm install
+          npm test