Validator Class Added with Builder Pattern

[SankalpaFernando]

Validator Class Added (For Function Chaining)

Added a Validator Class that using the builder pattern to validate the data using chained validation functions

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)

[codecov]

Codecov Report

Merging #1749 (7ad9d0d) into master (c899b31) will decrease coverage by 3.28%.
The diff coverage is 58.68%.

@@             Coverage Diff             @@
##            master    #1749      +/-   ##
===========================================
- Coverage   100.00%   96.71%   -3.29%     
===========================================
  Files          102      104       +2     
  Lines         2015     2103      +88     
  Branches       454      470      +16     
===========================================
+ Hits          2015     2034      +19     
- Misses           0       69      +69     

Impacted Files	Coverage Δ
src/lib/builder.js	2.81% <2.81%> (ø)
src/index.js	100.00% <100.00%> (ø)
src/lib/index.js	100.00% <100.00%> (ø)
src/lib/isEmail.js	100.00% <0.00%> (ø)
src/lib/isIdentityCard.js	100.00% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c899b31...7ad9d0d. Read the comment docs.

[tux-tn]

Hello @SankalpaFernando
Thank you for your PR! Is it a work in progress?

[SankalpaFernando]

@tux-tn The validators need to be added. I'll add them in a future PR

[fedeci]

We still need tests here.

[SankalpaFernando]

Created a new file called index.js in the ./lib directory and put all the validator exporting in that file. Meantime, a separate test file was created to test the validator class.

[tux-tn]

I'm not sure we want to move or add a builder/chaining pattern to the library.
Since it's a big change,I suggest we wait for the community feedback about this feature.
cc @profnandaa @ezkemboi