fix: use our versions of the presets for transpiling

If you simply pass package names into babel's list of presets then it'll try to load them from the working directory. That doesn't work for us, so we need to resolve–but not load!–the presets relative to babel-codemod itself.

Fixes #102

src/transpile-requires.ts

@@ -30,10 +30,10 @@ export function hook(code: string, filename: string): string {
 
   if (!useBabelrc) {
     if (ext === '.ts') {
-      options.presets.push('@babel/preset-typescript');
+      options.presets.push(require.resolve('@babel/preset-typescript'));
     }
 
-    options.presets.push('@babel/preset-env');
+    options.presets.push(require.resolve('@babel/preset-env'));
   }
 
   return transform(code, options).code as string;