Update dependency sprockets to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sprockets	'~>3.0' -> '~>4.0'

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Release Notes

rails/sprockets (sprockets)

v4.2.1

Compare Source

• Fix for precompile issues when multiple extensions map to the same MIME type (eg. .jpeg / .jpg). #​781
• Fix application/css-sourcemap+json charset #​764
• Fix compatibility with Rack 2 applications. #​790

v4.2.0

Compare Source

• Rack 3 compatibility. #​758
• Fix thread safety of Sprockets::CachedEnvironment and Sprockets::Cache::MemoryStore. #​771
• Add support for Rack 3.0. Headers set by sprockets will now be lower case. #​758
• Make Sprockets::Utils.module_include thread safe on JRuby. #​759
• Fix typo in asset.rb file. #​768

v4.1.1

Compare Source

• Fix Sprockets::Server to return response headers to be compatible with Rack::Lint 2.0.

v4.1.0

Compare Source

• Allow age to be altered in asset:clean rake task.
• Fix Sprockets::Server to return lower-cased response headers to comply with Rack::Lint 3.0. #​744
• Adding new directive depend_on_directory #​668
• Fix application/js-sourcemap+json charset #​669
• Fix CachedEnvironment caching nil values #​723
• Process *.jst.ejs.erb files with ERBProcessor #​674
• Fix cache key for coffee script processor to be dependent on the filename #​670

v4.0.3

Compare Source

• Fix Manifest#find yielding from a Promise causing issue on Ruby 3.1.0-dev. #​720
• Better detect the ERB version to avoid deprecation warnings. #​719
• Allow assets already fingerprinted to be served through Sprockets::Server
• Do not fingerprint files that already contain a valid digest in their name
• Remove remaining support for Ruby < 2.4.#​672

v4.0.2

Compare Source

• Fix etag and digest path compilation that were generating string with invalid digest since 4.0.1.

v4.0.1

Compare Source

• Fix for Ruby 2.7 keyword arguments warning in base.rb. #​660
• Fix for when x_sprockets_linecount is missing from a source map.
• Fix subresource integrity to match the digest of the asset.

v4.0.0

Compare Source

• Fixes for Ruby 2.7 keyword arguments warnings #​625
• Manifest files are sorted alphabetically #​626

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⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻️ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
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The artifact failure details are included below:

File name: Gemfile.lock

ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x86_64-linux]

ERROR:  Could not find a valid gem 'bundler' (= 2.2.0.dev) in any repository
ERROR:  Possible alternatives: bundler

[renovate]

⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: Gemfile.lock

installing v2 tool ruby v2.8.0

curl: (22) The requested URL returned error: 404 
Download failed: https://github.com/containerbase/ruby-prebuild/releases/download/2.8.0/ruby-2.8.0-focal-x86_64.tar.xz