Cosmetic improvements

[Kronuz]

• Better foreground color contrast (calculated)
• Rounded selection

[ryu1kn]

@Kronuz Apologies for my slow response and thank you for the PR!

It's great, the characters under highlights are much more visible now. I'm happy to merge this in but I'm thinking to introduce a flag to enable this feature as it overwrites the colour given by the syntax highlighting, and some people might want to see the original colour 😉

[Kronuz]

@ryu1kn I have since updated a couple other things and fixed a bug, I’ll add another pull request to fix that.

[ryu1kn]

Cool thanks @Kronuz 👍It hasn't been released yet, so take your time 😉

[ryu1kn]

Hi @Kronuz , I need to make a change on master; so I've created a branch highcontrast-text-colour that is equivalent to the master and rewound the master back to the state before merging your changes. You can create a PR against highcontrast-text-colour branch when it's ready. Thanks 😉

[Kronuz]

The bug was already fixed in the pull request, I just didn't think it was... the other thing I changed was using color-name package instead of declaring the color names ourselves. I'm opening a new pull request for that one now :)

[ryu1kn]

Sorry the slow response. I've just published it as v1.2.0! Thanks for your help 😉