Added support for WebP #310

Job	Run time
Julia 1 - macOS-13 x64	4m 46s
Julia 1 - macOS-latest aarch64	2m 27s
Julia 1 - ubuntu-latest x64	3m 33s
Julia 1 - windows-latest x64	4m 45s
Julia lts - macOS-13 x64	5m 57s
Julia lts - macOS-latest aarch64	1m 59s
Julia lts - ubuntu-latest x64	2m 24s
Julia lts - windows-latest x64	5m 10s
Julia 1.6 - macOS-13 x64	4m 4s
Julia 1.6 - ubuntu-latest x64	2m 41s
Julia 1.6 - windows-latest x64	7m 57s
Julia 1 - ubuntu-latest x86	4m 42s
Julia nightly - ubuntu-latest x64	5m 6s
	55m 31s

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