feat: support .tsx files with JSX syntax (#96)

* Configure ts-node to transpile JSX for React

This allows oclif to parse jsx found in .tsx files.

* Allow oclif to discover .tsx files

Notably does _not_ add support for .jsx files yet since this will
require a separate tool chain to work with something like Babel as a
transpiler for JSX in Javascript files.

Also ensures that test files that are .tsx are still ignored.

src/plugin.ts

@@ -224,8 +224,8 @@ export class Plugin implements IPlugin {
     }
     this._debug(`loading IDs from ${this.commandsDir}`)
     const patterns = [
-      '**/*.+(js|ts)',
-      '!**/*.+(d.ts|test.ts|test.js|spec.ts|spec.js)',
+      '**/*.+(js|ts|tsx)',
+      '!**/*.+(d.ts|test.ts|test.js|spec.ts|spec.js)?(x)',
     ]
     const ids = globby.sync(patterns, {cwd: this.commandsDir})
     .map(file => {

src/ts-node.ts

@@ -75,6 +75,7 @@ function registerTSNode(root: string) {
         sourceMap: true,
         rootDirs,
         typeRoots,
+        jsx: 'react',
       },
     })
   } finally {