docs: add yarn and pnpm installation commands

[ersachin3112]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

add yarn and pnpm installation commands

Breaking Changes

NA

Additional Info

NA

[codecov]

Codecov Report

Merging #564 (e5642a0) into master (1422b44) will decrease coverage by 18.57%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #564       +/-   ##
===========================================
- Coverage   93.67%   75.09%   -18.58%     
===========================================
  Files           5        5               
  Lines         316      265       -51     
  Branches      106       69       -37     
===========================================
- Hits          296      199       -97     
+ Misses         18       17        -1     
- Partials        2       49       +47     

Impacted Files	Coverage Δ
src/index.js	75.38% <0.00%> (-24.62%)	⬇️
src/utils.js	71.42% <0.00%> (-18.68%)	⬇️
src/Error.js	100.00% <0.00%> (ø)
src/Warning.js	100.00% <0.00%> (ø)

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