added email character blacklist

[rubiin]

This fixes the stale pr #1377

Checklist

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

[rubiin]

@profnandaa after this is approved , i will work on another pr

[codecov]

Codecov Report

Merging #1449 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1449   +/-   ##
=======================================
  Coverage   99.92%   99.92%           
=======================================
  Files          96       96           
  Lines        1276     1278    +2     
=======================================
+ Hits         1275     1277    +2     
  Misses          1        1           

Impacted Files	Coverage Δ
src/lib/isEmail.js	100.00% <100.00%> (ø)

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[profnandaa]

@rubiin -- can fix the merge conflict?
I have opted the repo into hacktoberfest by adding the topic; so I think there's no need to add the labels, right?

[rubiin]

sure , let me do it asap

[rubiin]

@profnandaa all done

[profnandaa]

LGTM, thanks for the contrib! 🎉

/cc. @tux-tn @ezkemboi -- please check.

[rubiin]

@profnandaa any updates on this

[profnandaa]

Let's wait for @ezkemboi / @tux-tn review.

[rubiin]

@ezkemboi @tux-tn

[ezkemboi]

Reviewing this one @rubiin. Sorry for the delay.

[ezkemboi]

The changes are solid. Though since this is a fix of stale or clean up, we could have made use of the guidelines below
Maintenance:-PR-Clean-Up