fix(common): silence "use server" directive build warning (#466)

Author: hi-ogawa

packages/common/warning.ts

@@ -7,7 +7,8 @@ export const silenceUseClientWarning = (
     onwarn(warning, defaultHandler) {
       if (
         warning.code === 'MODULE_LEVEL_DIRECTIVE' &&
-        warning.message.includes('use client')
+        (warning.message.includes('use client') ||
+          warning.message.includes('use server'))
       ) {
         return
       }