Major bug fixes in Susi Desktop

Bug Fixes

What was the issue(s)?

The electron version used in the app was old and had critical security issues. Which was stated by me in this issue made - #105
Clicking the link in the app didnt open the link in new window or browser. This was highlighted by me in this issue - #106
The package manager must be updated to yarn as yarn is cooler than npm. It was stated in this issue - #107
The travis and codacy had conflicts in thier checks which made one of them fail always whiihc was stated in the issue here - #109.

What was the solution?

For opening the link in another window there were two options node-open package or open-external. I worked it out with open external as it is inbuilt in electron library.
Following code segment was used for it -

webview.addEventListener('new-window', e => {
        const protocol = require('url').parse(e.url).protocol;
        if (protocol === 'http:' || protocol === 'https:') {
            shell.openExternal(e.url);
        }
    });

Electron update was done with the correct commad.
npm was replaced with yarn
For codacy to be configured i alignment with Travis I added .eslintrc.js. This added config for Codacy to perform checks in a PR.