Limit CI trigger to push on master and PRs (#397)

.github/workflows/dummy.yml

@@ -1,6 +1,10 @@
 name: Dummy specs
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
 
 jobs:
   test:

.github/workflows/generator.yml

@@ -1,6 +1,10 @@
 name: Generator specs
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
 
 jobs:
   test:

.github/workflows/jest.yml

@@ -1,6 +1,10 @@
 name: Jest specs
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
 
 jobs:
   jest:

.github/workflows/js-lint.yml

@@ -1,6 +1,10 @@
 name: JS lint
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
 
 jobs:
   lint:

.github/workflows/rubocop.yml

@@ -1,6 +1,10 @@
 name: Rubocop
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
 
 jobs:
   rubocop:

.github/workflows/ruby-backward-compatibility.yml

@@ -1,6 +1,10 @@
 name: Ruby specs - Backward compatibility
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
 
 jobs:
   test:

.github/workflows/ruby.yml

@@ -1,6 +1,10 @@
 name: Ruby specs
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
 
 jobs:
   test: