📦 Update dependency autoprefixer to v10

[renovate-bot]

This PR contains the following updates:

Package	Update	Type	Change	Package file
autoprefixer	major	devDependencies	9.8.0 -> 10.0.1	package.json

How to resolve breaking changes

This PR may introduce breaking changes that require manual intervention. In such cases, you will need to check out this branch, fix the cause of the breakage, and commit the fix to ensure a green Travis build. To check out and update this PR, follow the steps below:

# Check out the PR branch (these steps are from GitHub)
git checkout -b renovate-bot-renovate/core-autoprefixer-10.x master
git pull https://github.com/renovate-bot/amphtml.git renovate/core-autoprefixer-10.x

# Directly make fixes and commit them
gulp lint --fix # For lint errors in JS files
gulp prettify --fix # For prettier errors in non-JS files
# Edit source code in case of new compiler warnings / errors

# Push the changes to the branch
git push git@github.com:renovate-bot/amphtml.git renovate-bot-renovate/core-autoprefixer-10.x:renovate/core-autoprefixer-10.x

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Release Notes

postcss/autoprefixer

v10.0.1

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• Fix PostCSS 8.1 compatability.
• Add our OpenCollective to package.json.
• Clean up code (by Sukka).

v10.0.0

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Autoprefixer 10 is based on top of PostCSS 8 (check Known Issues section before updating).

Node.js 6.x, 8.x, 11.x support was removed.

Now you need to install Autoprefixer by npm install --save-dev autoprefixer postcss. We moved postcss from dependencies to peerDependencies according to new PostCSS plugin guidelines.

v9.8.6

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• Fixed env option.

v9.8.5

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• Improved Grid Layout warnings (by Daniel Tonon).
• Fixed align-self and justify-self with display: flex (by Daniel Tonon).

v9.8.4

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• Replace color output library.

v9.8.3

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• Return old non-LTS Node.js versions to avoid breaking changes.

v9.8.2

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• Remove Node.js 13.0-13.7 from supported engines, because of buggy ESM support.

v9.8.1

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• Replace chalk to kleur (by Luke Edwards).
• Update docs (by @​mbomb007).

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[danielrozenberg]

@erwinmombay this renovate-bot PR breaks stuff and it looks like you're the primary user of this dependency. Can you take a look and fix/let me know how to fix this?

[erwinmombay]

@danielrozenberg looking