Phone number for Lesotho(266)

[DevilsAutumn]

Added validation for Lesotho on isMobilePhone.
referred issue : #1761
@tux-tn @ezkemboi

Checklist

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

[codecov]

Codecov Report

Merging #1896 (934fce0) into master (f055c11) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master     #1896   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          102       102           
  Lines         2072      2072           
  Branches       472       472           
=========================================
  Hits          2072      2072           

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

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[rubiin]

Looks good

[profnandaa]

LGTM, thanks for your contribution!