Tests

feat: remove deprecated feeder gateway methods (#516) #1019

Job	Run time
Unix tests (ubuntu-latest, stable)	1m 59s
WASM tests	4m 7s
Unix tests (ubuntu-latest, nightly)	1m 52s
Unix tests (macos-11, stable)	8m 4s
Unix tests (macos-11, nightly)	6m 22s
Windows tests (stable, x86_64-pc-windows-gnu)	5m 19s
Windows tests (stable, x86_64-pc-windows-msvc)	7m 15s
no-std build	1m 30s
Windows tests (nightly, x86_64-pc-windows-gnu)	3m 44s
Windows tests (nightly, x86_64-pc-windows-msvc)	6m 42s
	46m 54s

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