List Linux dependencies for Arch-based distros

I noticed that you explicitly give the dependencies for Ubuntu (and I guess all Debian-based distros) and CentOS (and I guess all RedHat-based distros), but found that you’re missing the Arch-based ones (Manjaro etc.).

The corresponding markdown for source/_partial/linux_dependencies.md would be:

#### Arch/Manjaro
```shell
sudo pacman -s gtk2 gtk3 libnotify gconf nss xscreensaver alsa-lib libxtst xorg-xauth xorg-server-xvfb
```

[bahmutov]

Look what we do to test Docker image in https://github.com/cypress-io/cypress-docker-images/blob/master/circle.yml#L76

ENV CI=1
RUN npm init --yes
RUN npm install --save-dev cypress
RUN ./node_modules/.bin/cypress verify
RUN npx @bahmutov/cly init
RUN ./node_modules/.bin/cypress run

This creates new project, adds Cypress, scaffolds a spec file (using @bahmutov/cly init) and runs Cypress to verify the spec works

[bahmutov]

Sure - you can look at the base images in https://github.com/cypress-io/cypress-docker-images that install all OS dependencies necessary to then install and run Cypress. Here is one from https://github.com/cypress-io/cypress-docker-images/tree/master/base/12.18.3 for example

FROM node:12.18.3-buster

RUN apt-get update && \
  apt-get install --no-install-recommends -y \
  libgtk2.0-0 \
  libgtk-3-0 \
  libnotify-dev \
  libgconf-2-4 \
  libgbm-dev \
  libnss3 \
  libxss1 \
  libasound2 \
  libxtst6 \
  xauth \
  xvfb \
  # install Chinese fonts
  # this list was copied from https://github.com/jim3ma/docker-leanote
  fonts-arphic-bkai00mp \
  fonts-arphic-bsmi00lp \
  fonts-arphic-gbsn00lp \
  fonts-arphic-gkai00mp \
  fonts-arphic-ukai \
  fonts-arphic-uming \
  ttf-wqy-zenhei \
  ttf-wqy-microhei \
  xfonts-wqy \
  # clean up
  && rm -rf /var/lib/apt/lists/*

RUN npm install -g npm@latest
RUN npm --version

RUN npm install -g yarn@latest --force
RUN yarn --version

# a few environment variables to make NPM installs easier
# good colors for most applications
ENV TERM xterm
# avoid million NPM install messages
ENV npm_config_loglevel warn
# allow installing when the main user is root
ENV npm_config_unsafe_perm true

# Node libraries
RUN node -p process.versions

# versions of local tools
RUN echo  " node version:    $(node -v) \n" \
  "npm version:     $(npm -v) \n" \
  "yarn version:    $(yarn -v) \n" \
  "debian version:  $(cat /etc/debian_version) \n" \
  "user:            $(whoami) \n"