master -> main [skip ci]

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,4 +1,4 @@
-**Please Read the [CONTRIBUTING Guidelines](https://github.com/babel/babel-loader/blob/master/CONTRIBUTING.md)**
+**Please Read the [CONTRIBUTING Guidelines](https://github.com/babel/babel-loader/blob/main/CONTRIBUTING.md)**
 *In particular the portion on Commit Message Formatting*
 
 **Please check if the PR fulfills these requirements**

CONTRIBUTING.md

@@ -12,6 +12,6 @@
 
   While personally I'm using the [node-style-guide](https://github.com/felixge/node-style-guide), as long you don't do something too weird or fancy, that's probably ok.
 
-  If, however, you want to ensure that you're following the node style guide, you can use [JSCS](https://github.com/jscs-dev/node-jscs). The rules are already set on the [.jscsrc](https://github.com/babel/babel-loader/blob/master/.jscsrc) file and there's most likely some [package](http://jscs.info/overview.html#friendly-packages) to your editor already.
+  If, however, you want to ensure that you're following the node style guide, you can use [JSCS](https://github.com/jscs-dev/node-jscs). The rules are already set on the [.jscsrc](https://github.com/babel/babel-loader/blob/main/.jscsrc) file and there's most likely some [package](http://jscs.info/overview.html#friendly-packages) to your editor already.
 
   Documentation, whether in the state of JavaDoc or simple line comments are always welcome.

README.md

@@ -2,7 +2,7 @@
 > Check the [7.x branch](https://github.com/babel/babel-loader/tree/7.x) for docs with Babel v6
 
 [![NPM Status](https://img.shields.io/npm/v/babel-loader.svg?style=flat)](https://www.npmjs.com/package/babel-loader)
-[![codecov](https://codecov.io/gh/babel/babel-loader/branch/master/graph/badge.svg)](https://codecov.io/gh/babel/babel-loader)
+[![codecov](https://codecov.io/gh/babel/babel-loader/branch/main/graph/badge.svg)](https://codecov.io/gh/babel/babel-loader)
 
 <div align="center">
   <a href="https://github.com/babel/babel">
@@ -126,7 +126,7 @@ rules: [
 
 #### **NOTE**: transform-runtime & custom polyfills (e.g. Promise library)
 
-Since [@babel/plugin-transform-runtime](https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-runtime) includes a polyfill that includes a custom [regenerator-runtime](https://github.com/facebook/regenerator/blob/master/packages/regenerator-runtime/runtime.js) and [core-js](https://github.com/zloirock/core-js), the following usual shimming method using `webpack.ProvidePlugin` will not work:
+Since [@babel/plugin-transform-runtime](https://github.com/babel/babel/tree/main/packages/babel-plugin-transform-runtime) includes a polyfill that includes a custom [regenerator-runtime](https://github.com/facebook/regenerator/blob/master/packages/regenerator-runtime/runtime.js) and [core-js](https://github.com/zloirock/core-js), the following usual shimming method using `webpack.ProvidePlugin` will not work:
 
 ```javascript
 // ...

src/transform.js

@@ -16,7 +16,7 @@ module.exports = async function (source, options) {
 
   // We don't return the full result here because some entries are not
   // really serializable. For a full list of properties see here:
-  // https://github.com/babel/babel/blob/master/packages/babel-core/src/transformation/index.js
+  // https://github.com/babel/babel/blob/main/packages/babel-core/src/transformation/index.js
   // For discussion on this topic see here:
   // https://github.com/babel/babel-loader/pull/629
   const { ast, code, map, metadata, sourceType } = result;