Upgrade to latest language client to fix errors in logs

I get this error in the logs when I type in an opening element. 

eg. type the following character-by-character:

```xml
<aaa>
```

and then I get

```
[Error - 11:03:11] Request textDocument/inlineCompletion failed.
  Message: Message could not be parsed.
  Code: -32700 
[object Object]
```

I think this can be resolved by upgrading to the latest language client version