Rescript Conversion

[sacarr]

This pull updates bs-dom-testing-library to Rescript 9.1.4.

Changes

• Rescript 9 revamps the JavaScript Promise API bindings, deprecating Js.Promise in favor of Patrick Ecker's Promise proposal. rescript-dom-testing-library now depends on ryyppy/rescript-promise.
• BuckleScript web-api bs-webapi dependency has been updated to the Reason Community webapi package rescript-webapi.
• Jest (see glensl/bs-jest pull request 96) and testing-library/dom dependencies updated to latest available version of each. Jest 27.0.0 switched from Jest-Jasmine to Jest-circus changing the behavior of before and after hooks. See glenslbs-jest pull request 96 for more information
• Recript 9 deprecates the |> pipe operator. rescript-dom-testing-library now uses the -> arrow pipe operator and data-first semantics
• Recript 9 deprecates the send.pipe decorator. rescript-dom-testing-library bindings now use the send decorator.

Non-breaking changes include

• rescript-dom-testing-library includes babel.config.js and jest.config.js illustrating how to transform Jest tests to use ES6 module format
• Readme.md updated to address changes

Tests All bs-dom-testing-library tests updated and passing

Other Considerations

• rescript-webapi is not yet released. Final release of rescript-webapi. When released, this pull may need to be updated to reflect changes in the rescript-webapi package.