Bump recast and babylon to support JSX fragments

[xixixao]

What is says on the can.

[xsburg]

Just wanted to point out that this PR basically adds support for TypeScript transformations as well, thanks to the effort of @benjamn and @Phoenixmatrix who supported it in the ast-types and recast packages.
All we need now is to create a babylon parser with enabled typescript option:

module.exports = function(fileInfo, api) {
  // your codemod here
}
const babylon = require('babylon');
const parserOptions = {
    sourceType: 'module',
    allowImportExportEverywhere: true,
    allowReturnOutsideFunction: true,
    plugins: [
        'jsx',
        'typescript',
        'asyncFunctions',
        'classConstructorCall',
        'doExpressions',
        'trailingFunctionCommas',
        'objectRestSpread',
        'decorators',
        'classProperties',
        'exportExtensions',
        'exponentiationOperator',
        'asyncGenerators',
        'functionBind',
        'functionSent',
        'dynamicImport'
    ]
};
module.exports.parser = {
    parse(code) {
        return babylon.parse(code, parserOptions);
    }
};

[benjamn]

With recast@0.14.2 (just published), @xsburg's example becomes even easier:

module.exports = function(fileInfo, api) {
  // your codemod here
}
// Use a parser (Babylon 7) preconfigured for TypeScript.
// Note that you still need to run `npm install babylon@next` yourself,
// since Recast does not depend directly on Babylon.
module.exports.parser = require("recast/parsers/typescript");

More information about passing a different parser to recast.parse. The preconfigured parsers are still a work in progress, so please let me know if they fail to meet your needs.

[Phoenixmatrix]

I believe there's still gonna be the issue of jsx vs type assertions (not using the "as" syntax) being mutually exclusive though?

[benjamn]

Yeah, recast/parsers/typescript currently doesn't include the jsx Babylon plugin.