Config Changes Not Being Saved
**Describe The Bug:**
Starting in 2.0.x seeing that any changes to cameras after initial setup do not get reflected in config. **NOTE: Seeing this in the release version of 2.0.x and the beta**

**To Reproduce:**

Using 2.0.x add a camera in with a set criteria (regular -re -i {stream} etc). 

1. After saving and rebooting Homebridge go back into the Config or Plugins, Settings and adjust a parameter, save, reboot again. 
2. After doing this I find that the config is showing the previous (original) version, not updating the changes you made. SO for example if you change the IP address in step 1 and rebooting, the IP address is not updated. 
3. Again this happens whether you are using the Plugins / Settings option to update or directly updating the config.JSON
4. What is strange is that if I remove the camera from Plugins / Settings, save, reboot then add from scratch, that update is reflected fine but cannot edit it afterwards.

**Expected behavior:**
Expect this to update the config.JSON and the camera-ffmpeg plugin to read the updated config

**Logs:**
Not seeing anything in the logs that pinpoints this issue currently but happy to provide. 


**Screenshots**
So here is an example. When I run v2.0.x here is what the logs show when accessing the camera:

[6/29/2020, 4:48:41 PM] [Camera-ffmpeg] ffmpeg -rtsp_transport http -re -i rtsp://xxxxxxx:xxxxxxx@192.168.xx.xx:554/cam/realmonitor?channel=1&subtype=0 -t 1 -vf scale=1280:720 -f image2 -


HOWEVER, here is what the Plugins / Settings section shows (notice the lack of -rtsp_transport in the config):


![Screenshot Of Plugins Settings For Camera FFMPEG](https://user-images.githubusercontent.com/388424/86064144-a00f3c80-ba29-11ea-8414-6249879e06fc.jpg)


Same can be said if you look at the config.JSON therefore its as if after initial setup of v2.0.x that NO changes/updates even in the JSON are being read by the plugin


![Screenshot of Config JSON For Camera FFMPEG](https://user-images.githubusercontent.com/388424/86064153-a3a2c380-ba29-11ea-944a-dddac90d212a.jpg)


Here is what is shown in the Homebridge-UI logs which shows the config.json is being saved and again the config file itself reflects those changes BUT camera-ffmpeg is not reading them:

[6/29/2020, 5:04:21 PM] [Config] Changes to config.json saved.
[1593471861811] INFO  (90189 on mycomputer.localdomain): request completed
    reqId: 10
    res: {
      "statusCode": 201

```

**Homebridge Config:**

**Environment:**

* **Node.js Version**: v12.16.3
* **NPM Version**: 6.14.5
* **Homebridge Version**: 1.1.1
* **Homebridge Camera FFmpeg Version**: v2.0.2=beta13 but appeared on all versions of 2.0.x tested so far
* **Homebridge Config UI X Plugin Version**: v4.23.2
* **Operating System**: macOS

