message: fix(core): export java exec type
diff: @@ -20,8 +20,8 @@ import * as Net from "@xmcl/net";
  import { GotBodyFn, GotInstance } from "got";
  const got: GotInstance<GotBodyFn<string>> = Net.got;
  -import Util, { MinecraftFolder, MinecraftLocation, JavaExecutor } from "@xmcl/util";
  +import Util, { JavaExecutor, MinecraftFolder, MinecraftLocation } from "@xmcl/util";
  export { ResolvedLibrary, ResolvedNative, ResolvedVersion, PartialResolvedVersion, LibraryInfo, VersionDiagnosis } from "@xmcl/version";
  export { World } from "@xmcl/world";
  -export { Util, MinecraftFolder, MinecraftLocation, Net, got };
  +export { Util, MinecraftFolder, MinecraftLocation, Net, got, JavaExecutor };
  