Docs: update references to default branch

.github/CONTRIBUTING.md

@@ -23,22 +23,22 @@ the feature you need.
 
 Thank you! To prevent the problem occurring again, please add unit tests that would have failed.
 
-Please select the `master` branch as the destination for your Pull Request so your fix can be included in the next minor release.
+Please select the `main` branch as the destination for your Pull Request so your fix can be included in the next minor release.
 
-Please squash your changes into a single commit using a command like `git rebase -i upstream/master`.
+Please squash your changes into a single commit using a command like `git rebase -i upstream/main`.
 
 To test C++ changes, you can compile the module using `npm install --build-from-source` and then run the tests using `npm test`.
 
 ## Submit a Pull Request with a new feature
 
-Please add JavaScript [unit tests](https://github.com/lovell/sharp/tree/master/test/unit) to cover your new feature.
+Please add JavaScript [unit tests](https://github.com/lovell/sharp/tree/main/test/unit) to cover your new feature.
 A test coverage report for the JavaScript code is generated in the `coverage/lcov-report` directory.
 
 Where possible, the functional tests use gradient-based perceptual hashes
 based on [dHash](http://www.hackerfactor.com/blog/index.php?/archives/529-Kind-of-Like-That.html)
 to compare expected vs actual images.
 
-You deserve to add your details to the [list of contributors](https://github.com/lovell/sharp/blob/master/package.json#L5).
+You deserve to add your details to the [list of contributors](https://github.com/lovell/sharp/blob/main/package.json#L5).
 
 Any change that modifies the existing public API should be added to the relevant work-in-progress branch for inclusion in the next major release.
 
@@ -93,5 +93,5 @@ Please feel free to ask any questions via a
 [new issue](https://github.com/lovell/sharp/issues/new).
 
 If you're unable to post details publicly, please
-[e-mail](https://github.com/lovell/sharp/blob/master/package.json#L5)
+[e-mail](https://github.com/lovell/sharp/blob/main/package.json#L5)
 for private, paid consulting.

.github/ISSUE_TEMPLATE/installation.md

@@ -5,6 +5,8 @@ labels: installation
 
 ---
 
+<!-- Please try to answer as many of these questions as possible. -->
+
 Did you see the [documentation relating to installation](https://sharp.pixelplumbing.com/install)?
 
 Have you ensured the architecture and platform of Node.js used for `npm install` is the same as the architecture and platform of Node.js used at runtime?

README.md

@@ -1,6 +1,6 @@
 # sharp
 
-<img src="https://cdn.jsdelivr.net/gh/lovell/sharp@master/docs/image/sharp-logo.svg" width="160" height="160" alt="sharp logo" align="right">
+<img src="https://cdn.jsdelivr.net/gh/lovell/sharp@main/docs/image/sharp-logo.svg" width="160" height="160" alt="sharp logo" align="right">
 
 The typical use case for this high speed Node.js module
 is to convert large images in common formats to
@@ -95,10 +95,10 @@ readableStream
 
 ## Contributing
 
-A [guide for contributors](https://github.com/lovell/sharp/blob/master/.github/CONTRIBUTING.md)
+A [guide for contributors](https://github.com/lovell/sharp/blob/main/.github/CONTRIBUTING.md)
 covers reporting bugs, requesting features and submitting code changes.
 
-[![Test Coverage](https://coveralls.io/repos/lovell/sharp/badge.svg?branch=master)](https://coveralls.io/r/lovell/sharp?branch=master)
+[![Test Coverage](https://coveralls.io/repos/lovell/sharp/badge.svg?branch=main)](https://coveralls.io/r/lovell/sharp?branch=main)
 [![Node-API v5](https://img.shields.io/badge/Node--API-v5-green.svg)](https://nodejs.org/dist/latest/docs/api/n-api.html#n_api_n_api_version_matrix)
 
 ## Licensing

docs/README.md

@@ -1,6 +1,6 @@
 # sharp
 
-<img src="https://cdn.jsdelivr.net/gh/lovell/sharp@master/docs/image/sharp-logo.svg" width="160" height="160" alt="sharp logo" align="right">
+<img src="https://cdn.jsdelivr.net/gh/lovell/sharp@main/docs/image/sharp-logo.svg" width="160" height="160" alt="sharp logo" align="right">
 
 The typical use case for this high speed Node.js module
 is to convert large images in common formats to
@@ -65,7 +65,7 @@ as [pngcrush](https://pmt.sourceforge.io/pngcrush/).
 
 ### Contributing
 
-A [guide for contributors](https://github.com/lovell/sharp/blob/master/.github/CONTRIBUTING.md)
+A [guide for contributors](https://github.com/lovell/sharp/blob/main/.github/CONTRIBUTING.md)
 covers reporting bugs, requesting features and submitting code changes.
 
 ### Licensing