An upgrade to `fuel-core` v0.20.1 #257

Job	Run time
cancel-previous-runs	2s
lint-toml-files	20s
cargo-verifications (fmt, --all --verbose -- --check)	48s
cargo-verifications (clippy, --all-targets --all-features)	1m 26s
cargo-verifications (check, --locked --all-targets --all-features)	1m 21s
cargo-verifications (test, --all-targets --all-features)	2m 45s
cargo-verifications (test, --all-targets --no-default-features)	2m 27s
build forc wallet release binaries	0s
publish-crates	0s
	9m 9s

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