Update build.yml (#11)

Author: guibranco

.github/workflows/build.yml

@@ -4,7 +4,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   build:
@@ -13,4 +13,4 @@ jobs:
     - uses: actions/checkout@v1
     - run: |
         npm ci
-        npm run all
+        npm run all