error: Uncaught (in promise) Error: not implemented p.kill("SIGKILL") about denon HOT 2 OPEN

$ deno install -qAf --unstable https://deno.land/x/denon/denon.ts
error: TS2345 [ERROR]: Argument of type 'string' is not assignable to parameter of type 'number'.
        p.kill("SIGKILL");
               ~~~~~~~~~
    at https://deno.land/x/[email protected]/src/daemon.ts:92:16

TS2345 [ERROR]: Argument of type 'string' is not assignable to parameter of type 'number'.
        p.kill("SIGKILL");
               ~~~~~~~~~
    at https://deno.land/x/[email protected]/src/daemon.ts:96:16

TS2724 [ERROR]: 'Deno' has no exported member named 'Signal'. Did you mean 'signal'?
      const signs: Deno.Signal[] = [
                        ~~~~~~
    at https://deno.land/x/[email protected]/src/daemon.ts:149:25

Found 3 errors.