chore(deps): pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
class-validator	devDependencies	pin	^0.13.2 -> 0.13.2
graphql	devDependencies	pin	^15 -> 15.8.0

Add the preset :preserveSemverRanges to your config if you don't want to pin your dependencies.

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[codecov]

Codecov Report

Merging #132 (ab3ec06) into main (49483b3) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #132   +/-   ##
=======================================
  Coverage   99.54%   99.54%           
=======================================
  Files          18       18           
  Lines         218      218           
  Branches       56       56           
=======================================
  Hits          217      217           
  Misses          1        1           

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