Merge pull request #129 from regexident/fix-clippy #528

Job	Run time
Check	1m 4s
Clippy	1m 6s
Rustfmt	24s
Build graph-mate with maturin	35s
Test Suite (stable)	2m 33s
Test Suite (cargo careful)	3m 44s
Test Suite (beta)	2m 32s
Run python tests	50s
Package graph_mate for Linux	0s
Package graph_mate for Windows	0s
Package graph_mate for Mac x86_64	0s
Package graph_mate for Mac Universal	0s
Release all Rust crates	0s
Release a Rust crate	0s
Release graph_mate	0s
	12m 48s

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