Dependency upgrade

[enikonemeth]

storybook had a wrong import :(

ReactMarkdown changed its props: https://github.com/remarkjs/react-markdown/blob/main/changelog.md
(source to children)

date-io is skipped as usual (material-ui date picker only work with the currently installed version)

react and react-dom cannot be updated to 17.x yet, we are waiting for http://github.com/enzymejs/enzyme/issues/2429 this issue. related PR: http://github.com/enzymejs/enzyme/pull/2430

webpack and ts-loader is not upgradable on sn-react-component-docs (storybook). No stable release currently support webpack 5.

[sensenet]

Site name	Url	Last deploy
sn-app-dev	https://609241eaf930bf901043193c--sn-app-dev.netlify.app	Wed May 05 2021 - 06:57:48 GMT+0000 (Coordinated Universal Time)
sn-react-component-docs-dev	https://609241ee2b63fb9297f98e0d--sn-react-component-docs-dev.netlify.app	Wed May 05 2021 - 06:57:51 GMT+0000 (Coordinated Universal Time)

[codecov]

Codecov Report

Merging #1299 (4d9b387) into develop (6af3d67) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #1299   +/-   ##
========================================
  Coverage    93.50%   93.50%           
========================================
  Files          232      232           
  Lines         6317     6317           
  Branches      1676     1676           
========================================
  Hits          5907     5907           
  Misses         410      410           

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