feat(tooltip): initial implementation

[arturmiz]

Closes #60

[codecov]

Codecov Report

Merging #101 into master will not change coverage by %.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #101   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           40        42    +2     
  Lines          263       278   +15     
  Branches        35        35           
=========================================
+ Hits           263       278   +15     

Impacted Files	Coverage Δ
src/components/tooltip/Tooltip.vue	100.00% <100.00%> (ø)
src/components/tooltip/index.js	100.00% <100.00%> (ø)

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