Replace trimEnd with trim

trimEnd was introduced in Node.js 10.0 which is not in the 6.0 version we
use.

maxctrl/lib/common.js

@@ -144,7 +144,7 @@ module.exports = function() {
             str = str.replace( /\x1B\[[(?);]{0,2}(;?\d)*./g, '')
 
             // Trim trailing whitespace that cli-table generates
-            str = str.split(os.EOL).map(s => s.split('\t').map(s => s.trimEnd()).join('\t')).join(os.EOL)
+            str = str.split(os.EOL).map(s => s.split('\t').map(s => s.trim()).join('\t')).join(os.EOL)
         }
         return str
     }