sass: remove most moz-ism

-moz-focus-inner still here as it seems needed

sass: purge webkit-ism

it is 2020 and a blog for hackers should not use vendor prefix

sass: remove opera-ism

real opera has dead so long

sass: remove ms-ism

we don't support ie/trident-edge starting from removing smooth-scroll.js

sass: trim currently unused feature

js: trim currently unused feature

update noto sans tc light

scroll: add more margin for masthead

use css smooth scroll

smaller masthead

smaller indent

smaller footer

move to webpack

posts: mark syntax languages

highlight color tweaks

update uglifyjs

purge jquery.ba-throttle-debounce, seems unused

lighter code background

fix syntax highlighting color

reduce h1 size