updated footer date

[Neilblaze]

The current date states 2019, where as it needs to be updated to 2020.
The added script will fix the issue & it doesn't have to be updated every year.

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[Neilblaze]

Okay so now this is interesting! The script <script>document.write(new Date().getFullYear());</script> doesn't works here. 😕
I think I need to change that to default 2020.

[stefanbuck]

Thanks for the PR. I think we can just change it to:

Copyright (c) 2019–present

[Neilblaze]

@stefanbuck here you go!