bump ImageMagick_jll, add test for #206 #79

Job	Run time
Julia 1.6 - ubuntu-latest - x64 - pull_request	1m 59s
Julia 1.6 - ubuntu-latest - x64 - pull_request	1m 59s
Julia 1.6 - macOS-latest - x64 - pull_request	2m 15s
Julia 1.6 - macOS-latest - x64 - pull_request	2m 15s
Julia 1.6 - windows-latest - x64 - pull_request	7m 13s
Julia 1.6 - windows-latest - x64 - pull_request	9m 40s
Julia 1 - ubuntu-latest - x64 - pull_request	1m 43s
Julia 1 - ubuntu-latest - x64 - pull_request	1m 43s
Julia 1 - macOS-latest - x64 - pull_request	3m 8s
Julia 1 - macOS-latest - x64 - pull_request	3m 8s
Julia 1 - windows-latest - x64 - pull_request	3m 11s
Julia 1 - windows-latest - x64 - pull_request	3m 11s
	41m 25s

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