fix(): use an environment variable to force colors instead of using the --colors flag. (#1557)

Author: jthoms1

lib/cli.js

@@ -316,9 +316,12 @@ Cli.runWithNpmScripts = function runWithNpmScripts(argv, taskInstance, rawCliArg
 
 Cli.runNpmHook = function runNpmHook(hook) {
   var cmd = 'npm';
-  var args = ['run', hook, '--color'];
+  var args = ['run', hook];
   var command = cmd + ' ' + args;
 
+  // Force colors for all spawned child processes
+  process.env['FORCE_COLOR'] = true;
+
   var q = Q.defer();
   var spawn = require('cross-spawn-async');