Fix broken build travis CI

[thamaraiselvam]

Currently, build is broken

More info can be found here

https://travis-ci.org/thamaraiselvam/vscode-remove-blank-lines/jobs/592709433

[artrs-prog]

I'll look into this.

[shawncarr]

Sorry, I thought I commented that I was going to look at this. I can close my PR as @artrs-prog did officially ask for it.

[thamaraiselvam]

@shawncarr Let it be open If @artrs-prog dont raise one then will merge yours.

[artrs-prog]

Feel free to merge since you've done it. Would've done something like this anyway. I'll look into coverage instead.