Added support for WebP #312

Job	Run time
Julia 1 - macOS-13 x64	3m 35s
Julia 1 - macOS-latest aarch64	1m 33s
Julia 1 - ubuntu-latest x64	1m 47s
Julia 1 - windows-latest x64	3m 31s
Julia lts - macOS-13 x64	4m 0s
Julia lts - macOS-latest aarch64	1m 59s
Julia lts - ubuntu-latest x64	2m 20s
Julia lts - windows-latest x64	3m 38s
Julia 1.6 - macOS-13 x64	3m 37s
Julia 1.6 - ubuntu-latest x64	2m 29s
Julia 1.6 - windows-latest x64	13m 31s
Julia 1 - ubuntu-latest x86	2m 6s
Julia nightly - ubuntu-latest x64	1m 58s
	46m 4s

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