Added support for WebP #311

Job	Run time
Julia 1 - macOS-13 x64	3m 55s
Julia 1 - macOS-latest aarch64	3m 6s
Julia 1 - ubuntu-latest x64	3m 22s
Julia 1 - windows-latest x64	5m 6s
Julia lts - macOS-13 x64	2m 55s
Julia lts - macOS-latest aarch64	1m 29s
Julia lts - ubuntu-latest x64	2m 13s
Julia lts - windows-latest x64	3m 28s
Julia 1.6 - macOS-13 x64	6m 16s
Julia 1.6 - ubuntu-latest x64	2m 41s
Julia 1.6 - windows-latest x64	9m 6s
Julia 1 - ubuntu-latest x86	4m 27s
Julia nightly - ubuntu-latest x64	5m 18s
	53m 22s

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