Elixir mix lockfiles fail to parse certain git definitions about semgrep HOT 3 OPEN

@tophersmith I've implemented these fixes, and the changes should be synced to this repo and pushed out in 1.74.0

Thank you for the reports

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A few related parser issues I'm finding as well:

lockfile can have these definitions for dependencies that aren't supported by this parser:
{:hex, :testing, "1.0.1", "1234bb4db5b32fc0f8aa5c4a2040348b4aa36687100fb8837b850e90cf60e06", [:mix], [], "hexpm"}
(i.e. there's no final comma, quoted_str)

Also, git tag/refs can be empty:
{:git, "https://github.com/okeuday/erlang_term.git", "9eb28c6eb54acab3d491fa69655f9eaf663378da", []},

FWIW, I am also getting frequent issues related to trailing newlines in .exs files and I don't understand why.
Failed to parse [bold]discord_voice_curator/deps/observer_cli/mix.exs[/bold] at [bold]17:1[/bold] - expected 'did not
find other parser'
17 |
for this file: https://github.com/zhongwencool/observer_cli/blob/master/mix.exs

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Hey @tophersmith, I'm looking at these issues now. I'll link a PR once it's up.

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