Added support for WebP #304

Job	Run time
Julia 1 - macOS-13 x64	5m 44s
Julia 1 - macOS-latest aarch64	2m 25s
Julia 1 - ubuntu-latest x64	1m 59s
Julia 1 - windows-latest x64	3m 33s
Julia lts - macOS-13 x64	3m 18s
Julia lts - macOS-latest aarch64	1m 37s
Julia lts - ubuntu-latest x64	2m 15s
Julia lts - windows-latest x64	4m 34s
Julia 1.6 - macOS-13 x64	3m 37s
Julia 1.6 - ubuntu-latest x64	2m 29s
Julia 1.6 - windows-latest x64	5m 56s
Julia 1 - ubuntu-latest x86	5m 51s
Julia nightly - ubuntu-latest x64	5m 9s
	48m 27s

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