Meta: default branch rename

Helps with whatwg/meta#174.

.github/workflows/build.yml

@@ -2,10 +2,10 @@ name: Build
 on:
   pull_request:
     branches:
-    - master
+    - main
   push:
     branches:
-    - master
+    - main
 jobs:
   build:
     name: Build

.github/workflows/test.yml

@@ -2,10 +2,10 @@ name: Test
 on:
   pull_request:
     branches:
-    - master
+    - main
   push:
     branches:
-    - master
+    - main
 jobs:
   test:
     name: Test

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Streams Standard contributor guidelines
 
-These are the guidelines for contributing to the Streams Standard. First see the [WHATWG contributor guidelines](https://github.com/whatwg/meta/blob/master/CONTRIBUTING.md).
+These are the guidelines for contributing to the Streams Standard. First see the [WHATWG contributor guidelines](https://github.com/whatwg/meta/blob/main/CONTRIBUTING.md).
 
 We label [good first issues](https://github.com/whatwg/streams/labels/good%20first%20issue) that you could help us fix, to get a taste for how to submit pull requests, how the build process works, and so on.
 

PULL_REQUEST_TEMPLATE.md

@@ -7,7 +7,7 @@ Thank you for contributing to the Streams Standard! Please describe the change y
    * …
 - [ ] [Tests](https://github.com/web-platform-tests/wpt) are written and can be reviewed and commented upon at:
    * …
-- [ ] [Implementation bugs](https://github.com/whatwg/meta/blob/master/MAINTAINERS.md#handling-pull-requests) are filed:
+- [ ] [Implementation bugs](https://github.com/whatwg/meta/blob/main/MAINTAINERS.md#handling-pull-requests) are filed:
    * Chrome: …
    * Firefox: …
    * Safari: …

README.md

@@ -13,7 +13,7 @@ started, leave a comment on the issue or ask around [on IRC](https://whatwg.org/
 ## Pull requests
 
 In short, change `index.bs` and submit your patch, with a
-[good commit message](https://github.com/whatwg/meta/blob/master/COMMITTING.md). Consider
+[good commit message](https://github.com/whatwg/meta/blob/main/COMMITTING.md). Consider
 reading through the [WHATWG FAQ](https://whatwg.org/faq) if you are new here.
 
 Please add your name to the Acknowledgments section in your first pull request, even for trivial
@@ -39,12 +39,12 @@ implementation in order to pass those tests.
 
 For quick local iteration, run `make`. To verify your changes locally, run `make deploy`. See more
 in the
-[WHATWG Contributor Guidelines](https://github.com/whatwg/meta/blob/master/CONTRIBUTING.md#building).
+[WHATWG Contributor Guidelines](https://github.com/whatwg/meta/blob/main/CONTRIBUTING.md#building).
 
 ## Merge policy
 
 If you can commit to this repository, see the
-[WHATWG Maintainer Guidelines](https://github.com/whatwg/meta/blob/master/MAINTAINERS.md).
+[WHATWG Maintainer Guidelines](https://github.com/whatwg/meta/blob/main/MAINTAINERS.md).
 
 ## Code of conduct
 

demos/transforms/transform-stream-polyfill.js

@@ -1,6 +1,6 @@
 // Quick and dirty polyfill for TransformStream.
 // Based on the reference implementation:
-// https://github.com/whatwg/streams/blob/master/reference-implementation/lib/transform-stream.js
+// https://github.com/whatwg/streams/blob/main/reference-implementation/lib/transform-stream.js
 
 (function() {
 'use strict';