Validate if GeoPoint values is number

[paulovitin]

Issue #592...

[codecov]

Codecov Report

Merging #671 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #671      +/-   ##
==========================================
+ Coverage   85.67%   85.68%   +<.01%     
==========================================
  Files          48       48              
  Lines        3874     3876       +2     
  Branches      877      879       +2     
==========================================
+ Hits         3319     3321       +2     
  Misses        555      555

Impacted Files	Coverage Δ
src/ParseGeoPoint.js	95.45% <100%> (+0.14%)	⬆️

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