[Snackbar] Fix SnackbarOrigin TypeScript definition

[kobelobster]

This PR fixes #12072 by

• Renaming all occurences of SnackBar to Snackbar
• Making horizontal and vertical properties of SnackbarOrigin mandatory.

Please note, that this is a BC break, but I think we don't follow Semver, do we @oliviertassinari ?

Result of yarn test

yarn run v1.7.0
$ yarn lint && yarn flow && yarn typescript && yarn test:unit
$ eslint . --cache && echo "eslint: no lint errors"
(node:9743) [ESLINT_LEGACY_OBJECT_REST_SPREAD] DeprecationWarning: The 'parserOptions.ecmaFeatures.experimentalObjectRestSpread' option is deprecated. Use 'parserOptions.ecmaVersion' instead. (found in "node_modules/eslint-config-airbnb-base/index.js")
eslint: no lint errors
$ flow --show-all-errors
No errors!
$ tsc -p tsconfig.json
$ cross-env NODE_ENV=test mocha packages/material-ui/test/**/*.test.js packages/material-ui/src/{,**/}*.test.js docs/src/**/*.test.js


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  1570 passing (4s)

Done in 15.53s.

[kobelobster]

Hm, why does test_browser fail? I don't really get the error

Should not have any git not staged

because I pushed changes in snackbar.md. What's exactly meant by that?

[oliviertassinari]

because I pushed changes in snackbar.md. What's exactly meant by that?

@tzfrs run yarn docs:api you should be good :)

[oliviertassinari]

@tzfrs It's a great first pull request on Material-UI 👌🏻. Thank you for giving it a shot!

[kobelobster]

@oliviertassinari I saw your commit, but it's not correct. I made the horizontal and vertical required and your commit fb4c8f1#diff-a34c3e44f550e3e16cf0c3e4c049a119R19 made the parameters in the doc optional again, however they MUST be defined as horizontal and vertical (no question mark), don't they?

[oliviertassinari]

@tzfrs I have made nothing, I have run the tool that automatically generates the documentation. Thanks for raising, it's a broader issue. The Popover is also affected (anchorOrigin, transformOrigin)

[kobelobster]

Ah okay, but how does the popover affect the snackbar documentation? Are we okay with having a "wrong" documentation for now?

[oliviertassinari]

Well, this pull request is fixing the TypeScript definition. It's already a good step forward. Now, we need to fix the prop-types.