Merge branch 'develop' into 'master'

src/debug.h

src/main.cpp

src/number.h

src/simulation.cpp

src/simulation.h

src/simulation/compile.cpp

src/simulation/compile.h

src/simulation/format_code.h

src/simulation/instruction.h

src/simulation/run.cpp

src/simulation/run.h

src/simulation/simulation.cpp

src/simulation/simulation.h

src/span.h

test/conftest.py

test/fixtures/operation_tree.py

test/fixtures/port.py

test/fixtures/signal.py

test/fixtures/signal_flow_graph.py

test/operation/test_abstract_operation.py