Upgrade SaltyRTC client version

package-lock.json

@@ -862,9 +862,9 @@
       "integrity": "sha512-im7GXKhUsNKTbppZOA0Jqx0Yku+3FILe/CENMlX5PT1tP95Dfu1VadIaBgNevxstnCadrYPTtxVeXc2MwxO3jw=="
     },
     "@saltyrtc/client": {
-      "version": "0.13.2",
-      "resolved": "https://registry.npmjs.org/@saltyrtc/client/-/client-0.13.2.tgz",
-      "integrity": "sha512-qYcheT4bgNby1IebOLlKYwBe66SvIJnRO3pgc4oAJ9dzqeT5IghgFMUj3VXyh1D9r86FfVdjpJ3uzkO3lftzJA=="
+      "version": "0.14.4",
+      "resolved": "https://registry.npmjs.org/@saltyrtc/client/-/client-0.14.4.tgz",
+      "integrity": "sha512-Onf2xTI76khZ9AHvIxoS8xMdgOhIHGP406QlBbCcmFoocoDmuHiTyrhh3ZteUDsTzx/t0LZ4yAAPp0PH5g5HNA=="
     },
     "@saltyrtc/task-relayed-data": {
       "version": "0.3.1",

package.json

@@ -39,7 +39,7 @@
     "@babel/plugin-transform-runtime": "^7.4.3",
     "@babel/preset-env": "^7.4.3",
     "@babel/runtime": "^7.4.3",
-    "@saltyrtc/client": "^0.13.2",
+    "@saltyrtc/client": "^0.14.4",
     "@saltyrtc/task-relayed-data": "^0.3.1",
     "@saltyrtc/task-webrtc": "^0.13.0",
     "@threema/compose-area": "^0.3.1",