fix: logging error instead of completely swalling it

Author: Michel Hofmann

lib/index.js

@@ -90,7 +90,11 @@ var WebpackShellPlugin = function () {
   createClass(WebpackShellPlugin, [{
     key: 'puts',
     value: function puts(error) {
-      if (error && !this.options.swallowError) {
+      if (error) {
+        if (this.options.swallowError) {
+          console.log(error.message);
+          return;
+        }
         throw error;
       }
     }

src/webpack-shell-plugin.js

@@ -18,7 +18,11 @@ export default class WebpackShellPlugin {
   }
 
   puts(error) {
-    if (error && !this.options.swallowError) {
+    if (error) {
+      if (this.options.swallowError) {
+        console.log(error.message);
+        return;
+      }
       throw error;
     }
   }