bump: rust 1.53.0

[baszalmstra]

No description provided.

[codecov]

Codecov Report

Merging #334 (d53c2f2) into master (2240306) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #334      +/-   ##
==========================================
- Coverage   80.32%   80.30%   -0.02%     
==========================================
  Files         259      259              
  Lines       15554    15556       +2     
==========================================
- Hits        12493    12492       -1     
- Misses       3061     3064       +3     

Impacted Files	Coverage Δ
crates/mun_hir/src/item_scope.rs	48.10% <100.00%> (ø)
crates/mun_hir/src/package_defs/collector.rs	83.18% <100.00%> (ø)
crates/mun_hir/src/source_id.rs	73.80% <100.00%> (-2.39%)	⬇️
crates/mun_runtime/src/lib.rs	71.33% <100.00%> (ø)
crates/mun_syntax/src/parsing/lexer/cursor.rs	96.20% <0.00%> (-2.54%)	⬇️
crates/mun_syntax/src/parsing/lexer/classes.rs	100.00% <0.00%> (ø)

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