Fix panic when parsing improper scientific notation. #1067

Job	Run time
Fuzz Tests	1m 5s
Check file formatting and style	1m 5s
Dependency Tests (stable)	2m 44s
Check documentation	58s
Dependency Tests (beta)	2m 49s
Check minimum rust version	2m 20s
Database Tests - MySQL (stable)	1m 20s
Database Tests - MySQL (beta)	1m 19s
Database Tests - PostgreSQL (stable)	2m 58s
Standard Tests (stable)	2m 21s
Database Tests - PostgreSQL (beta)	2m 54s
Standard Tests (beta)	2m 21s
Database Tests	1s
Test	1s
Pass	1s
	24m 17s

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