fix: Make toggle-local work on windows

CONTRIBUTING.md

@@ -25,6 +25,7 @@ Sometimes, it may be necessary to work on Capacitor in parellel with the plugin(
 5. Toggle each plugin to use your local copy of Capacitor.
 
     ```shell
+    npm install
     npm run toggle-local
     ```
 

package.json

@@ -25,6 +25,7 @@
     "@actions/core": "^1.9.1",
     "@ionic/prettier-config": "^1.0.1",
     "@types/prompts": "^2.0.8",
+    "cross-spawn": "^7.0.3",
     "esm": "^3.2.25",
     "lerna": "^3.22.1",
     "prettier": "~2.3.0",

scripts/lib/subprocess.mjs

@@ -1,8 +1,8 @@
 import * as cp from 'child_process';
 import * as util from 'util';
+import spawn from 'cross-spawn';
 
 export const exec = util.promisify(cp.exec);
-export const spawn = cp.spawn;
 export const run = (cmd, args, options) => wait(spawn(cmd, args, options));
 export const wait = async p => {
   return new Promise((resolve, reject) => {