separate HorizontalBar component added

[imbashamba]

To remove optional 'type' parameter at Bar component, which was ignored inside reactive mixins.
It was resulting in horizontal bars becoming vertical after dataset reactive change

Fix or Enhancement?

Fix

• [* ] All tests passed

Environment

• OS: Windows 10 x64
• NPM Version: 3.10.10

[codecov]

Codecov Report

Merging #56 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #56   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           9     10    +1     
  Lines          75     85   +10     
=====================================
+ Hits           75     85   +10

Impacted Files	Coverage Δ
src/BaseCharts/Bar.js	100% <ø> (ø)	✅
src/BaseCharts/HorizontalBar.js	100% <100%> (ø)
src/index.js	100% <100%> (ø)	✅

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[apertureless]

Thanks for the PR! 👍