back,pusher,uploader: cleanup dependencies

Move typescript/ts-node-dev to dev dependencies, remove unused
dependencies.

back/package.json

@@ -38,23 +38,17 @@
   "homepage": "https://github.com/thecodingmachine/workadventure#readme",
   "dependencies": {
     "axios": "^0.21.1",
-    "body-parser": "^1.19.0",
     "busboy": "^0.3.1",
     "circular-json": "^0.5.9",
     "debug": "^4.3.1",
     "generic-type-guard": "^3.2.0",
     "google-protobuf": "^3.13.0",
     "grpc": "^1.24.4",
-    "http-status-codes": "^1.4.0",
-    "iterall": "^1.3.0",
     "jsonwebtoken": "^8.5.1",
     "mkdirp": "^1.0.4",
-    "multer": "^1.4.2",
     "prom-client": "^12.0.0",
     "query-string": "^6.13.3",
     "systeminformation": "^4.31.1",
-    "ts-node-dev": "^1.0.0-pre.44",
-    "typescript": "^3.8.3",
     "uWebSockets.js": "uNetworking/uWebSockets.js#v18.5.0",
     "uuidv4": "^6.0.7"
   },
@@ -71,6 +65,8 @@
     "@typescript-eslint/eslint-plugin": "^2.26.0",
     "@typescript-eslint/parser": "^2.26.0",
     "eslint": "^6.8.0",
-    "jasmine": "^3.5.0"
+    "jasmine": "^3.5.0",
+    "ts-node-dev": "^1.0.0-pre.44",
+    "typescript": "^3.8.3"
   }
 }