fix: Expose isSaved method on ParseFile and ParseOperation #528

Job	Run time
windows	3m 11s
windows	3m 11s
spm-test	6m 16s
spm-test	6m 16s
linux	3m 7s
linux	3m 7s
test (platform=iOS\ Simulator,name=iPhone\ 14\ Pro\ Max, test)	26m 40s
test (platform=iOS\ Simulator,name=iPhone\ 14\ Pro\ Max, test)	14m 37s
test (platform\=tvOS\ Simulator,name\=Apple\ TV, test)	8m 30s
test (platform\=tvOS\ Simulator,name\=Apple\ TV, test)	8m 30s
test (platform=watchOS\ Simulator,name=Apple\ Watch\ Series\ 5\ \(40mm\), build)	2m 40s
test (platform=watchOS\ Simulator,name=Apple\ Watch\ Series\ 5\ \(40mm\), build)	2m 40s
test (platform=macOS, test)	7m 15s
test (platform=macOS, test)	7m 15s
docs	1m 30s
docs	1m 30s
xcode-test-5_5	1m 17s
xcode-test-5_5	1m 17s
cocoapods	7m 1s
cocoapods	7m 1s
	2h 2m 51s

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