Call conan in ci #731

Job	Run time
build (ubuntu-latest, gcc, g++)	3m 38s
build (macos-latest, clang, clang++)	14m 53s
build (ubuntu-20.04, gcc-7, g++-7)	7m 24s
build (ubuntu-20.04, gcc-5, g++-5)	7m 14s
build (windows-latest)	6m 49s
test (ubuntu-latest, gcc, g++)	21m 40s
test (macos-latest, clang, clang++)	40m 31s
test (ubuntu-20.04, gcc-7, g++-7)	21m 20s
test (ubuntu-20.04, gcc-5, g++-5)	21m 30s
test (windows-latest)	1h 27m 37s
	3h 52m 36s

Provide feedback