Log Message:
gleam: Update to version 0.28.3

Changelog:

v0.28.3 - 2023-04-17

    Fixed a bug where the language server would show outdated error diagnostics \ 
when a new one was emitted in a different module.
    Fixed a bug where the language server would attempt to analyse Gleam modules \ 
that were outside of the src or test directories.
    New Gleam projects are created with actions/checkout@v3.5.1 and \ 
erlef/setup-beam@1.15.3 in their GitHub actions CI configuration.

v0.28.2 - 2023-04-10

    Fixed a bug where comments above a use expression would be formatted incorrectly.
    Fixed a bug where the formatter would fail to preserve empty lines after a block.
    Fixed a bug where the formatter would fail to preserve empty lines after an \ 
anonymous function with a return annotation.