fix code style and throw error on unsupported timestamp
fix code style and throw error on unsupported timestamp

GrahamGoudeau21/TinCanJS,nagyistoce/TinCanJS,garemoko/TinCanJS,garyfeng/TinCanJS,brianjmiller/TinCanJS,GrahamGoudeau21/TinCanJS,FishHooks/TinCanJS,brianjmiller/TinCanJS,RusticiSoftware/TinCanJS,EdDixon/TinCanJS,EdDixon/TinCanJS,nagyistoce/TinCanJS,RusticiSoftware/TinCanJS,garemoko/TinCanJS,FishHooks/TinCanJS,garyfeng/TinCanJS