feat(term): getting/setting console flags (windows) #52

Job	Run time
test (ubuntu-20.04, 5.1)	17s
test (ubuntu-20.04, 5.2)	18s
test (ubuntu-20.04, 5.3)	18s
test (ubuntu-20.04, 5.4)	16s
test (ubuntu-20.04, luajit)	17s
test (ubuntu-20.04, luajit-openresty)	16s
test (macos-11.0, 5.1)	49s
test (macos-11.0, 5.2)	51s
test (macos-11.0, 5.3)	44s
test (macos-11.0, 5.4)	45s
test (macos-11.0, luajit)	48s
test (macos-11.0, luajit-openresty)	52s
test (macos-latest, 5.4)	47s
test (windows-latest, 5.1, msvc)	1m 8s
test (windows-latest, 5.2, msvc)	1m 12s
test (windows-latest, 5.3, msvc)	58s
test (windows-latest, 5.4, msvc)	58s
test (windows-latest, luajit, mingw)	1m 9s
	12m 43s

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