Merge pull request #105 from kwvg/bump_1.3.4 #405

Job	Run time
macos-latest, cmake, gcc, easy backend	33s
macos-latest, cmake, gcc, gmp backend	35s
macos-latest, cmake, clang, easy backend	36s
macos-latest, cmake, clang, gmp backend	46s
macos-latest, autotools, gcc, easy backend	1m 0s
macos-latest, autotools, gcc, gmp backend	1m 22s
macos-latest, autotools, clang, easy backend	1m 2s
macos-latest, autotools, clang, gmp backend	1m 36s
ubuntu-20.04, cmake, gcc, easy backend	1m 34s
ubuntu-20.04, cmake, gcc, gmp backend	1m 50s
ubuntu-20.04, cmake, clang, easy backend	1m 31s
ubuntu-20.04, cmake, clang, gmp backend	1m 55s
ubuntu-20.04, autotools, gcc, easy backend	2m 7s
ubuntu-20.04, autotools, gcc, gmp backend	2m 7s
ubuntu-20.04, autotools, clang, easy backend	2m 5s
ubuntu-20.04, autotools, clang, gmp backend	2m 9s
	22m 48s

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