feat(string): add binary and octal random string generation

[pladreyt]

This PR implements binary and octal random string generation.

Issue: #184

PR that implements this feature in number module: #1708

[ST-DDT]

Especially octal and binary seem to have a multitude of common prefixes, should we use '' as the default prefix for all of them?

Only one of our methods uses a non-empty prefix (etheriumAddress), all other 5 methods use ''.

[codecov]

Codecov Report

Merging #1710 (6ece169) into next (d3229fc) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             next    #1710   +/-   ##
=======================================
  Coverage   99.63%   99.63%           
=======================================
  Files        2249     2249           
  Lines      240482   240573   +91     
  Branches     1083     1095   +12     
=======================================
+ Hits       239607   239698   +91     
  Misses        854      854           
  Partials       21       21           

Impacted Files	Coverage Δ
src/modules/number/index.ts	100.00% <100.00%> (ø)
src/modules/string/index.ts	100.00% <100.00%> (ø)

[pladreyt]

Especially octal and binary seem to have a multitude of common prefixes, should we use '' as the default prefix for all of them?

Only one of our methods uses a non-empty prefix (etheriumAddress), all other 5 methods use ''.

Also the hexadecimal method uses a non-empty prefix, I was using it as a base. Was keeping the prefix for consistency with that method, but I can set it to ''

[ST-DDT]

Please add @see to and from the number module.

[pladreyt]

Please add @see to and from the number module.

Sure!

[ST-DDT]

Two minor changes, then we are good to go from my side.

[ST-DDT]

Thanks for your contribution.