feat(FileDropzone): add new FileDropzone component

[evenchange4]

DEMO

[netlify]

success

Built with commit 5789cac

https://deploy-preview-84--mcs-ui.netlify.com

[codecov]

Codecov Report

Merging #84 into master will decrease coverage by 0.05%.
The diff coverage is 82.6%.

@@            Coverage Diff             @@
##           master      #84      +/-   ##
==========================================
- Coverage   84.29%   84.24%   -0.06%     
==========================================
  Files         161      164       +3     
  Lines         745      768      +23     
  Branches       54       56       +2     
==========================================
+ Hits          628      647      +19     
- Misses         71       75       +4     
  Partials       46       46

Impacted Files	Coverage Δ
src/FileDropzone/styled-components.js	100% <100%> (ø)
src/utils/toMB.js	100% <100%> (ø)
src/FileDropzone/FileDropzone.js	63.63% <63.63%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 429428a...5789cac. Read the comment docs.