framebinprovider doesn't check if process is already killed

[ryanleecode]

error: Uncaught TypeError: Child process has already terminated.
    this.env.signal.addEventListener("abort", () => process.kill("SIGINT"))
                                                            ^
    at ChildProcess.kill (ext:runtime/40_process.js:321:13)
    at AbortSignal.<anonymous> (file:///github/workspace/providers/frame/FrameBinProvider.ts:48:61)
    at innerInvokeEventListeners (ext:deno_web/02_event.js:783:7)
    at invokeEventListeners (ext:deno_web/02_event.js:823:5)
    at dispatch (ext:deno_web/02_event.js:692:9)
    at AbortSignal.dispatchEvent (ext:deno_web/02_event.js:1082:12)
    at AbortSignal.[[[signalAbort]]] (ext:deno_web/03_abort_signal.js:92:10)
    at AbortController.abort (ext:deno_web/03_abort_signal.js:165:30)
    at onReady (file:///github/workspace/main.ts:77:16)
    at async Object.onListen (file:///github/workspace/main.ts:63:7)