Cannot load homebridge-ewelink - Error: certificate has expired
**What issue do you have? Please be as thorough and explicit as possible.**

Upgrade plugin "homebridge-ewelink" to version 2.25.0 and restart server

**Details of your setup.**
Homebridge v1.1.6
homebridge-ewelink v2.25.0
Node.js v10.21.0
Npm v6.14.7

Which version of Homebridge/HOOBS do you have?

1.1.6

Which version of this plugin (homebridge-ewelink) do you have?

2.25.0

**Please paste any relevant logs below. It helps if you can turn 
```
[9/9/2020 2:33:45] [eWeLink] HTTP API host received [eu-apia.coolkit.cc].
[9/9/2020 2:33:45] [eWeLink] Sending HTTP login request.
[9/9/2020 2:33:47] [eWeLink] 🔴  Cannot load homebridge-ewelink - Error: certificate has expired
(node:592) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'close' of undefined
    at eWeLinkWS.closeConnection (/usr/local/lib/node_modules/homebridge-ewelink/lib/eWeLinkWS.js:278:15)
    at httpClient.getHost.then.then.then.then.then.then.catch.err (/usr/local/lib/node_modules/homebridge-ewelink/lib/eWeLink.js:98:33)
    at process._tickCallback (internal/process/next_tick.js:68:7)
(node:592) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:592) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
```