Switch default JS minifier to metro-minify-terser internally

Summary:
Align internal Metro configuration of `minifierPath` with the OSS default, and away from the deprecated `uglify-es`.

This also allows us to remove some hacks necessary to test `uglify-es`, because it uses `fs` to load its dependencies.

Reviewed By: motiz88

Differential Revision: D43391760

fbshipit-source-id: 0c91b82bdb8e8b0054051a6d4ca40f440a8516f8

packages/metro-source-map/package.json

@@ -25,7 +25,7 @@
   "devDependencies": {
     "@babel/core": "^7.20.0",
     "@babel/parser": "^7.20.0",
-    "uglify-es": "^3.1.9"
+    "terser": "^5.15.0"
   },
   "engines": {
     "node": ">=16"

packages/metro-source-map/src/__tests__/composeSourceMaps-test.js

@@ -18,7 +18,7 @@ const fs = require('fs');
 const invariant = require('invariant');
 const {add0, add1} = require('ob1');
 const path = require('path');
-const uglifyEs = require('uglify-es');
+const terser = require('terser');
 
 /* eslint-disable no-multi-str */
 
@@ -83,9 +83,9 @@ describe('composeSourceMaps', () => {
     }
   });
 
-  it('verifies merged source maps work the same as applying them separately', () => {
+  it('verifies merged source maps work the same as applying them separately', async () => {
     // Apply two tranformations: compression, then mangling.
-    const stage1 = uglifyEs.minify(
+    const stage1 = await terser.minify(
       {'test1.js': TestScript1, 'test2.js': TestScript2},
       {
         compress: true,
@@ -98,7 +98,7 @@ describe('composeSourceMaps', () => {
       'Minification error in stage1',
     );
     const {code: code1, map: map1} = stage1;
-    const stage2 = uglifyEs.minify(
+    const stage2 = await terser.minify(
       {'intermediate.js': code1},
       {compress: true, mangle: true, sourceMap: true},
     );