* Fix reference to return produced by ApplicativeDo
see https://github.com/digital-asset/ghc/pull/53 for details.
fixes#6820
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* bump to merged commit
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* switch to new ghc-lib
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* Update rules_haskell
* Pin stack_snapshot repositories
* Document stack_snapshot_json
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* Don't pin stack_snapshot on Windows
The lock file is generated on Unix and includes unix specific
dependencies, e.g. `unix`. Most developers don't have easy access to a
Windows machine, so regenerating the lock file for Windows would be
inconvenient.
* upgrade stack 2.1.3 --> 2.3.1 on Windows
Co-authored-by: Andreas Herrmann <andreas.herrmann@tweag.io>