fix: add newline after context

Author: jdx

src/errors.ts

@@ -76,7 +76,7 @@ export function getErrorMessage(err: any, opts: {stack?: boolean} = {}): string
     let stack = err.stack || inspect(err)
     stack = clean(stack, {pretty: true})
     stack = extract(stack)
-    message = [message, stack].join('\n')
+    message = [message, '', stack].join('\n')
   } else {
     let bang = severity === 'warn' ? chalk.yellow(arrow) : chalk.red(arrow)
     if (severity === 'warn') bang = chalk.yellow(arrow)