Fix Cargo.toml warning #724

Job	Run time
rustfmt	15s
clippy - Ubuntu	1m 40s
stable - Ubuntu - debug	2m 55s
clippy - Windows	3m 56s
stable - Debian (cross to Windows) - debug	2m 21s
stable - Ubuntu - release	3m 59s
stable - Debian (cross to Windows) - release	2m 56s
beta - Ubuntu - debug	3m 5s
beta - Debian (cross to Windows) - debug	2m 19s
stable - Windows - debug	6m 17s
stable - Windows - release	7m 13s
beta - Windows - debug	4m 38s
Publish Wiki	17s
	41m 51s

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