Replacing "babylon" with "babel"

[wuweiweiwu]

Replace babylon with babel in all js files, directories, md files, tests, updated tests

closes #4508

would this be a breaking change?

prettier.format("lodash ( )", {
  parser(text, { babel }) { // <-- babel instead of babylon
    const ast = babel(text);
    ast.program.body[0].expression.callee.name = "_";
    return ast;
  }
});

• I’ve added tests to confirm my change works. NA
• (If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory)
• I’ve read the contributing guidelines.

✨Try the playground for this PR✨

[j-f1]

I think this would be a breaking change unfortunately since anyone specifying parser: babylon would get an error now.

[duailibe]

@wuweiweiwu if we go through with this change, we need to accept "babylon" as a parser and print a warning saying it changed to "babel".

[ikatyang]

@wuweiweiwu FYI, there's an Add suggestion to batch button that you can combine all suggestions in a single commit.

[wuweiweiwu]

Oh I see. Will use next time. Thanks!

[ikatyang]

Thanks!

[lala010addict]

I keep getting errors Couldn't resolve parser "babel" after this update. Any ideas on how to fix it? Thanks

[duailibe]

@lala010addict Please open a new issue, filling the template