fix: replace bigint literals with BigInt constructors

[steveluscher]

Problem

Some JavaScript runtimes support BigInt but not bigint literals.

Summary of Changes

• Replace 18446744073709551615n with BigInt('0xffffffffffffffff')

This makes web3.js compatible with runtimes that don't understand bigint literals but do understand BigInt constructors. For whatever that's worth.

[steveluscher]

I'm not 100% sure we should do this. It's just a thought.

[codecov]

Codecov Report

Merging #27930 (74117f8) into master (e6687b8) will increase coverage by 0.1%.
The diff coverage is 95.8%.

@@            Coverage Diff            @@
##           master   #27930     +/-   ##
=========================================
+ Coverage    77.3%    77.4%   +0.1%     
=========================================
  Files          55       55             
  Lines        2889     2910     +21     
  Branches      402      404      +2     
=========================================
+ Hits         2234     2255     +21     
  Misses        514      514             
  Partials      141      141