Build on main, tags, and PRs (#293)

As is this builds on any push and also any PR.  This results in double
workflows on PRs.

.github/workflows/build-aarch64.yml

@@ -1,6 +1,14 @@
 name: Build ARM64 wheel
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
 
 jobs:
   build_wheels:

.github/workflows/build-m1-wheel.yml

@@ -1,6 +1,14 @@
 name: Build M1 Wheels
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
 
 jobs:
   build_wheels:

.github/workflows/build-test.yaml

@@ -1,6 +1,14 @@
 name:  Build and Test C++, Javascript, and Python
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
 
 jobs:
   build_wheels:

.github/workflows/build-wheels.yml

@@ -1,6 +1,14 @@
 name: Build wheels
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
 
 jobs:
   build_wheels: