Allow true, false and null in object patterns

[jedel1043]

This Pull Request allows using certain valid keywords inside patterns.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	94,118	94,118	0
Passed	74,620	74,620	0
Ignored	17,750	17,750	0
Failed	1,748	1,748	0
Panics	0	0	0
Conformance	79.28%	79.28%	0.00%

[codecov]

Codecov Report

Merging #2994 (cd1ef41) into main (65bf54d) will decrease coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2994      +/-   ##
==========================================
- Coverage   50.22%   50.15%   -0.07%     
==========================================
  Files         446      446              
  Lines       46019    46030      +11     
==========================================
- Hits        23114    23088      -26     
- Misses      22905    22942      +37     

Impacted Files	Coverage Δ
boa_parser/src/parser/statement/mod.rs	60.53% <100.00%> (+0.17%)	⬆️

... and 15 files with indirect coverage changes

[Razican]

It seems that there is no test for this in Test262, so we should probably add our own, and maybe add a test to Test262.

[HalidOdat]

Looks good to me! +1 for the tests to test262, if not then our own :)

[jedel1043]

It seems that there is no test for this in Test262, so we should probably add our own, and maybe add a test to Test262.

Will add both a test here and a PR on Test262, just to avoid blocking this on that PR.

[Razican]

Thanks!