Replace all instances of `Self` in methods #1452

Job	Run time
Check	1m 45s
build_nightly	2m 47s
build_examples	5m 22s
build_benchmarks	1m 18s
Verify that web-sys is compiled correctly	1m 29s
Clippy	2m 59s
dist_linux_aarch64_gnu	5m 40s
dist_linux_x86_64_musl	5m 9s
dist_macos_aarch64	3m 45s
dist_macos_x86_64	3m 45s
dist_windows	4m 20s
doc_api	1m 34s
doc_book	11s
Rustfmt	18s
Build and test the deno example	1m 23s
Run js-sys crate tests	3m 20s
Run native tests	2m 46s
Run wasm-bindgen crate tests with multithreading enabled	2m 1s
Test TypeScript output of wasm-bindgen	1m 31s
Run UI compile-fail tests	4m 28s
Run wasm-bindgen crate tests (unix)	13m 13s
Run web-sys crate tests	7m 49s
Run wasm-bindgen-webidl crate tests	3m 32s
test_examples	3m 22s
deploy	1m 27s
	1h 25m 14s

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