Use -fspecialize-aggressively to improve performance by 30% on ACME b…

…uild (#4584)

* Use -fspecialize-aggressively to improve performance

* add fspecialize to cabal project

Build fully static compiler binary using ghc-musl (#4573)

* Build statically-linked binaries with ghc-musl

* Compliance for LGPL terms

* Add changelog entry

* Update dependencies

* Update LICENSE

* Update weeder

* Fix weeder

* Add more changelog entries

* Argument passthrough

* Update license

* Update license

* Build images for ARM

* Checkout after Node installation

* Only mount volumes for static

* Drop static prefix for now

* Force purge cache

* Remove builds against ubuntu

* Use matrix.os for cache key

* Fix linux only

* Set CI_STATIC to true

* CI_STATIC on Linux only

* Fix more linux only checks

Move to windows-2022 in CI (#4583)

GitHub is sunsetting the `windows-2019` runner that we use in CI

Upgrade to GHC 9.8.4 (#4574)

* Use latest HLint version in CI workflow
* Upgrade to latest version of Cheapskate
* Allow newer deps for weeder
* Use `NonEmpty String` for `directiveStrings`

IDE: don't force state results (#4546)

Fix imports for newer mtl versions (#4547)

Newer mtl does not re-export Control.Monad and Data.Monoid anymore.
So we fix that by splitting the imports manually.

Upgrade macOS runner to 14 (#4548)

Since the beginning of July GitHub has deprecated the macOS-11 runners that we were using, see [the announcement](https://github.blog/changelog/2024-05-20-actions-upcoming-changes-to-github-hosted-macos-runners/)

Remove Git upgrade step from CI (#4541)

buster-backports no longer exists in debian/dists and it's breaking CI.
The currently available version of Git in this container is 2.20.1, so
we don't need this.

Fix compiler crash when a type operator is used in a type argument (#…

…4536)

Add missing traversal branch for VisibleTypeApp in updateTypes

Prep 0.15.15 (#4533)

* Drop old bug entry

* Update version to 0.15.15

* Update changelog