Update cheatsheets

cabal

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# cabal
+
+> Command-line interface to the Haskell package infrastructure (Cabal).
+> Manage Haskell projects and Cabal packages from the Hackage package repository.
+> More information: <https://cabal.readthedocs.io/en/latest/intro.html>.
+
+- Search and list packages from Hackage:
+
+`cabal list {{search_string}}`
+
+- Show information about a package:
+
+`cabal info {{package}}`
+
+- Download and install a package:
+
+`cabal install {{package}}`
+
+- Create a new Haskell project in the current directory:
+
+`cabal init`
+
+- Build the project in the current directory:
+
+`cabal build`
+
+- Run tests of the project in the current directory:
+
+`cabal test`