Fixed broken au run command for Windows

.gitignore

@@ -11,4 +11,4 @@ dist
 /coverage
 /package-lock.json
 /yarn.lock
-.npmrc
+.npmrc

README.md

@@ -27,10 +27,9 @@ The `au new` command now simplify wraps `npx makes aurelia/v1`. Users can direct
 1. Clone the aurelia-cli: `git clone https://github.com/aurelia/cli.git`
 2. Go into the cli directory: `cd cli`
 3. Run `npm install`
-4. Run build `npm run build`
-5. Link the cli with: `npm link`
-6. Create a new project with `au new` or use an existing project. The linked CLI will be used to create the project.
-7. In the project directory, run `npm link aurelia-cli`. The linked CLI will then be used for `au` commands such as `au run`
+4. Link the cli with: `npm link`
+5. Create a new project with `au new` or use an existing project. The linked CLI will be used to create the project.
+6. In the project directory, run `npm link aurelia-cli`. The linked CLI will then be used for `au` commands such as `au run`
 
 ## Running the Tests
 

lib/package-managers/base-package-manager.js

@@ -1,5 +1,6 @@
 const {spawn} = require('child_process');
 const npmWhich = require('npm-which');
+const isWindows = process.platform === "win32";
 
 exports.BasePackageManager = class {
   constructor(executableName) {
@@ -11,11 +12,16 @@ exports.BasePackageManager = class {
   }
 
   run(command, args = [], workingDirectory = process.cwd()) {
+    let executable = this.getExecutablePath(workingDirectory);
+    if (isWindows) {
+      executable = JSON.stringify(executable); // Add quotes around path
+    }
+
     return new Promise((resolve, reject) => {
       this.proc = spawn(
-        this.getExecutablePath(workingDirectory),
+        executable,
         [command, ...args],
-        { stdio: 'inherit', cwd: workingDirectory }
+        { stdio: "inherit", cwd: workingDirectory, shell: isWindows }
       )
         .on('close', resolve)
         .on('error', reject);