fix: don't wrap first part of command in quotes

It seems as though some Windows systems don't allow the first part of
the command to be wrapped in quotes. We couldn't detect this issue on
CI, but this was reported by a user.

Fixes #7

Author: nfischer

index.js

@@ -4,10 +4,14 @@ const { cmdArrayAttr } = require('./common');
 const proxyifyCmd = (t, ...cmdStart) => {
   // Create the target (or use the one passed in)
   t = t || function _t(...args) {
-    // Wrap all the arguments in quotes
-    const newArgs = cmdStart
+    let newArgs = [];
+    // The first segment of the command should not be wrapped in quotes
+    newArgs.push(cmdStart[0]);
+
+    // Wrap all subsequent arguments in quotes
+    newArgs = newArgs.concat(cmdStart.slice(1)
       .concat(args)
-      .map((x) => JSON.stringify(x));
+      .map((x) => JSON.stringify(x)));
     // Run this command in the shell
     return origShell.exec.call(this.stdout, newArgs.join(' '));
   };