Cocotb-test

- Fix gui option for VCS (https://github.com/themperek/cocotb-test/pull/252)
- Added support for invoking the GUI for Riviera (https://github.com/themperek/cocotb-test/pull/250)
- Support arbitrarily long log lines (https://github.com/themperek/cocotb-test/pull/224)
- Fix riviera VHDL simulation (https://github.com/themperek/cocotb-test/issues/226)
- When using cocotb-run, set a timescale, if it's not set (https://github.com/themperek/cocotb-test/pull/231)
- Add make_args for Verilator (https://github.com/themperek/cocotb-test/pull/238)
- fixed VCS propagation of timescale and topmodule (https://github.com/themperek/cocotb-test/pull/240)
- Change fork to start_soon (https://github.com/themperek/cocotb-test/pull/249)
-

- Fix python 3.7 issues (216) and add more python versions in CI (218)
- Workaround for hanging on long log line (219)
- Fix possible race condition in xdist (221)

- Depend on find_libpython as external package 206
- Fix waveform dump for icarus 196
- Changed log command to trace [Questa]
- Added 'delete=False' to tempfile creation 192
- Support for multiple top level designs 177 178
- vcs waveform support 183
- Separate stdout and stderr logs, use asyncio 176
- Separate do script from run command for Questa 171

- Support for names libraries
- Fix incremental build (non-existing) for VHDL
- Fix Questa escape char
- Add HDL specific compile args
- Fail if a simulator command fails
- Add ability to specify simulator as an argument to run method
- Run Questa compile commands from the shell rather than as TCL
- Add aldec-activehdl support
- Add test for defines and includes
- Cleanup

- Ghdl: support waves argument 139
- fix exit gracefully 141
- GHDL: Add compile arguments to run/simulate command 142
- Verilator: Fix wave dump 145
- Xcelium : Fix command 145
- Questa: use incremental compilation rather than skipping 146

Cocotb 1.5 support