chore: update master -> main (#392)

Signed-off-by: Michael Dawson <[email protected]>

Author: mhdawson

.github/workflows/push.yml

@@ -3,7 +3,7 @@ name: on push or pull_request
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
   schedule:
     - cron:  '0 0 * * *'

COLLABORATOR_GUIDE.md

@@ -1,7 +1,7 @@
 # llnode Collaborator Guide
 
 llnode follows the
-[Node.js Collaborator Guide](https://github.com/nodejs/node/blob/master/COLLABORATOR_GUIDE.md),
+[Node.js Collaborator Guide](https://github.com/nodejs/node/blob/main/COLLABORATOR_GUIDE.md),
 with the following differences:
 
   - At least one Collaborator must approve a pull request before the pull

CONTRIBUTING.md

@@ -15,15 +15,15 @@ $ git remote add upstream git://github.com/indutny/llnode.git
 
 #### Which branch?
 
-For developing new features and bug fixes, the `master` branch should be pulled
+For developing new features and bug fixes, the `main` branch should be pulled
 and built upon.
 
 ### Step 2: Branch
 
 Create a feature branch and start hacking:
 
 ```text
-$ git checkout -b my-feature-branch -t origin/master
+$ git checkout -b my-feature-branch -t origin/main
 ```
 
 ### Step 3: Commit

LICENCE.md

@@ -4,7 +4,7 @@ The MIT License (MIT)
 Copyright (c) 2016 nodereport contributors
 --------------------------------------------------
 
-*nodereport contributors listed at <https://github.com/nodejs/nodereport/blob/master/AUTHORS>*
+*nodereport contributors listed at <https://github.com/nodejs/nodereport/blob/main/AUTHORS>*
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

README.md

@@ -9,8 +9,8 @@
 </p>
 
 [![npm](https://img.shields.io/npm/v/llnode.svg?style=flat-square)](https://npmjs.org/package/llnode)
-![ci](https://img.shields.io/github/workflow/status/nodejs/llnode/push/master?style=flat-square)
-[![coverage](https://img.shields.io/coveralls/github/nodejs/llnode/master?style=flat-square)](https://coveralls.io/github/nodejs/llnode)
+![ci](https://img.shields.io/github/workflow/status/nodejs/llnode/push/main?style=flat-square)
+[![coverage](https://img.shields.io/coveralls/github/nodejs/llnode/mmain?style=flat-square)](https://coveralls.io/github/nodejs/llnode)
 
 
 Node.js v10.x+ C++ plugin for the [LLDB](http://lldb.llvm.org) debugger.