imfreedom/ansible

Remove some old dependencies and move the mercurial dep to the role
---
# note: we assume python_install_path is defined in the `python` role that this
# role depends on
- name: install latest meson from pypi
become: yes
ansible.windows.win_command: "pip3.exe install --upgrade meson"
args:
chdir: '{{ python_install_path }}\Scripts'
register: install_output
changed_when: "'Successfully installed' in install_output.stdout"