Merge branch 'master' into joamag/color

.github/workflows/main.yml

.gitlab-ci.yml

CHANGELOG.md

Cargo.toml

README.md

frontends/sdl/Cargo.toml

frontends/sdl/README.md

frontends/sdl/src/audio.rs

frontends/sdl/src/graphics.rs

frontends/sdl/src/main.rs

frontends/web/package.json

frontends/web/react/components/help/help.tsx

frontends/web/ts/gb.ts

src/apu.rs

src/cpu.rs

src/gb.rs

src/lib.rs

src/mmu.rs

src/timer.rs