fix(public/exec): fixes parallel args

package.json

@@ -117,6 +117,7 @@
     "arg": "^4.1.0",
     "as-table": "^1.0.38",
     "cli-belt": "^0.3.0",
+    "command-join": "^2.0.0",
     "common-tags": "^1.8.0",
     "concurrently": "^4.1.0",
     "errorish": "^0.3.0",

src/@types/command-join.ts

@@ -0,0 +1,3 @@
+declare module 'command-join' {
+  export default function commandJoin(args: string[]): string;
+}

src/public/exec/parallel.ts

@@ -3,6 +3,7 @@ import { IExecOptions, IOfType } from '~/types';
 import logger from '~/utils/logger';
 import { wrap } from '~/utils/errors';
 import expose from '~/utils/expose';
+import join from 'command-join';
 
 export interface IParallelOptions extends IExecOptions {
   names?: string[];
@@ -43,8 +44,10 @@ const parallel: IParallel = (() => {
   ): (args?: string[]) => Promise<void> {
     return async (args?: string[]) => {
       const argv: string[] = Array.isArray(commands)
-        ? commands.concat()
-        : [commands];
+        ? commands.map(
+            (command) => command + (args && args.length ? ` ${join(args)}` : '')
+          )
+        : [commands + (args && args.length ? ` ${join(args)}` : '')];
 
       if (options.names && options.names.length) {
         argv.push('--names', options.names.join(','));
@@ -59,7 +62,7 @@ const parallel: IParallel = (() => {
       try {
         await core.exec(
           require.resolve('concurrently/bin/concurrently'),
-          args ? argv.concat(args) : argv,
+          argv,
           true,
           options
         );