Added a Feature of Ignoring some number tokens

[dhananjaypai08]

Fixes #5 Ignore parameter right now is for only the parse function(can also implement for parse_number and parse_ordinal once reviewed) Ignoring parameters present in the ignore list and not parsing it to a number and simply adding it as it is to the output string and then keep building further. Also have added few test cases in test_number_parsing for the same. Let me know what you think and can update the Readme once its approved.

[codecov[bot]]

Codecov Report

Merging #74 (4fd5e95) into master (8367865) will increase coverage by 0.37%. The diff coverage is 96.15%.

@@            Coverage Diff             @@
##           master      #74      +/-   ##
==========================================
+ Coverage   98.78%   99.15%   +0.37%     
==========================================
  Files          86       86              
  Lines         328      356      +28     
  Branches       61       69       +8     
==========================================
+ Hits          324      353      +29     
+ Misses          1        0       -1     
  Partials        3        3              

Impacted Files	Coverage Δ
number_parser/parser.py	98.89% <96.15%> (+0.53%)	:arrow_up: