Added ffmpeg progress bar via fluent-ffmpeg and progress libs (#57)

* Add fluent-ffmpeg back and cross-platform progress bar

* Repo clean up

Move ts files to src, build and output js files to build folder

* Do not print messages when exit code is 0

this is triggered by signal events

Co-authored-by: kylon <kylonux@gmail.com>

package.json

@@ -11,7 +11,7 @@
     "build": "echo Transpiling TypeScript to JavaScript... & node node_modules/typescript/bin/tsc --listEmittedFiles",
     "run": "node ./destreamer.js",
     "start": "npm run -s build & npm run -s run",
-    "test": "mocha"
+    "test": "mocha build/test"
   },
   "keywords": [],
   "author": "snobu",
@@ -28,12 +28,15 @@
     "tmp": "^0.1.0"
   },
   "dependencies": {
+    "@types/cli-progress": "^3.4.2",
     "@types/fluent-ffmpeg": "^2.1.14",
     "@types/jwt-decode": "^2.2.1",
     "axios": "^0.19.2",
+    "cli-progress": "^3.7.0",
     "colors": "^1.4.0",
-    "ffmpeg-progressbar-cli": "^1.5.0",
+    "fluent-ffmpeg": "^2.1.2",
     "is-elevated": "^3.0.0",
+    "iso8601-duration": "^1.2.0",
     "jwt-decode": "^2.2.0",
     "puppeteer": "^2.1.1",
     "sanitize-filename": "^1.6.3",