Grammar updates.

[orizi]

• Updated tree sitter version.
• Support for let ... else { .. }
• Support for A<> empty args.
• Support for 'asdf'_u16 short string literals.
• Support for generics named args.
• Support for macro declaration syntax.
• Support for paths in generic args.
• Support for .. in struct patterns.
• Support for ref wherever can be found.
• Support for usage of literal types as name in other places.

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This change is 

[orizi]

Reviewable status: 0 of 6 files reviewed, 1 unresolved discussion

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a discussion (no related file):
@0xLucqs do you mind having a look?

[0xLucqs]

lgtm

[orizi]

you still need to merge it :) (and preferably add me as owner)