[Merged by Bors] - Fix panic when calling toString with radix

[HalidOdat]

This Pull Request fixes/closes #2717 and related to #2479

This was caused by an incorrect to digit conversion.

Here are two examples that always cause a panic. They have been added as a test in number/test.rs

(0.1600057092765239).toString(36)
(0.23046743672210102).toString(36)

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	94,591	94,591	0
Passed	73,191	73,191	0
Ignored	17,530	17,530	0
Failed	3,870	3,870	0
Panics	0	0	0
Conformance	77.38%	77.38%	0.00%

[codecov]

Codecov Report

Merging #2863 (d8f90e0) into main (93b52cd) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2863      +/-   ##
==========================================
+ Coverage   50.92%   50.97%   +0.04%     
==========================================
  Files         419      419              
  Lines       41783    41824      +41     
==========================================
+ Hits        21280    21321      +41     
  Misses      20503    20503              

Impacted Files	Coverage Δ
boa_engine/src/builtins/number/mod.rs	85.56% <100.00%> (+3.96%)	⬆️

... and 4 files with indirect coverage changes

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[nekevss]

bors r+

[bors]

Pull request successfully merged into main.

Build succeeded:

• Build and Test (macos-latest)
• Build and Test (windows-latest)
• Coverage
• Misc