Fix GitHub workflows to also run on main branch (#181)

.github/workflows/docs.yml

@@ -2,8 +2,7 @@ name: Docs
 
 on:
   push:
-    branches:
-    - main
+    branches: [ "main" ]
   workflow_dispatch:
 
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages

.github/workflows/swiftlint.yml

@@ -1,6 +1,8 @@
 name: SwiftLint
 
 on:
+  push:
+    branches: [ "main" ]
   pull_request:
     types: [opened, synchronize, reopened]
   workflow_dispatch:

.github/workflows/unit.yml

@@ -1,6 +1,8 @@
 name: Unit Tests
 
 on:
+  push:
+    branches: [ "main" ]
   pull_request:
     types: [opened, synchronize, reopened]
   workflow_dispatch: