Provide different classes for the first and last days in date range.

[kuuusama]

There was no different classes provided for the first and last days in date range, so it was impossible to set different styles for that days. This commit should fix that issue.

[codecov-commenter]

Codecov Report

Merging #85 (bd58ddb) into master (4c4bad6) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #85      +/-   ##
==========================================
+ Coverage   91.08%   91.14%   +0.06%     
==========================================
  Files          23       23              
  Lines        1413     1423      +10     
  Branches      316      316              
==========================================
+ Hits         1287     1297      +10     
  Misses        126      126              

Impacted Files	Coverage Δ
.../src/lib/components/day-view/day-view.component.ts	100.00% <100.00%> (ø)
.../lib/services/angular-mydatepicker.util.service.ts	90.15% <100.00%> (+0.18%)	⬆️

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[kekeh]

Hi @kuuusama

I merged this pull request and published a new version (0.11.3) of the component to npm.