feat: record all calls (#352)

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* fix jslint

* fix

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* fix: add file ext

* fix: record format

* fix outbound

* update to drachtio-fsmrf with support for multiple recording streams on a call

* enable DTMF during background listen recording

* fix merge commit

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Co-authored-by: Dave Horton <daveh@beachdognet.com>

lib/tasks/dial.js

@@ -137,6 +137,7 @@ class TaskDial extends Task {
 
   get canReleaseMedia() {
     const keepAnchor = this.data.anchorMedia ||
+    this.cs.isBackGroundListen ||
     ANCHOR_MEDIA_ALWAYS ||
     this.listenTask ||
     this.transcribeTask ||