onvif: fix unsubscribe crash

.gitmodules

@@ -38,3 +38,6 @@
 [submodule "plugins/wyze/docker-wyze-bridge"]
 	path = plugins/wyze/docker-wyze-bridge
 	url = ../../koush/docker-wyze-bridge.git
+[submodule "plugins/onvif/onvif"]
+	path = plugins/onvif/onvif
+	url = git@github.com:koush/onvif

plugins/onvif/.npmignore

@@ -6,3 +6,4 @@ fs
 src
 .vscode
 dist/*.js
+onvif

plugins/onvif/package.json

@@ -1,6 +1,6 @@
 {
    "name": "@scrypted/onvif",
-   "version": "0.0.128",
+   "version": "0.0.130",
    "description": "ONVIF Camera Plugin for Scrypted",
    "author": "Scrypted",
    "license": "Apache",
@@ -42,7 +42,7 @@
       "base-64": "^1.0.0",
       "http-auth-utils": "^4.0.0",
       "md5": "^2.3.0",
-      "onvif": "^0.6.8",
+      "onvif": "file:./onvif",
       "xml2js": "^0.6.0"
    },
    "devDependencies": {