Travis defaults to it since this year.
Ubuntu trusty reached EOL since April 2019.
Ubuntu bionic provides Vim 8.
Simplify OS install with Travis' apt addon
so that only Vim nightly will be compiled from source.
Ubuntu 14.04.6 provides ruby v.1.9.3, not 1.8.x or older.
Use it to test the ruby provider for backward compatibility.
Signed-off-by: Jan Edmund Lazo <jan.lazo@mail.utoronto.ca>
* Refactor Command class for easier reading.
* Some other minor clean ups & method renames.
* Change travis to use `env` and `matrix` to select builds.
* Use case instead of ifs to select behaviour.
* Buffer updates now managed by __main__ loop with buf_q.
* Synchronous neovim install temporarily provided by python installer.
* Known issues:
* No ctrl-c/interrupt support on nvim.
* Graphical bug: https://github.com/neovim/python-client/issues/103
* Main differences from ruby are inside Command class, notably it
poll/sleeps on the subprocess to check output & timeout.
* Another difference, interrupt is not instaneous due to checking var.
* Otherwise, I mainly just mirrored code into objects.
* Note that due to GVim freeze, disabling use on Windows
