Tests

Don't clone env on each call of Expr::eval #2354

Job	Run time
Code coverage in tests	22m 56s
Check intra-documentation links	2m 13s
Build without default features	1m 27s
Test Swift(iOS) bindings	3m 8s
Clippy (linter)	1m 12s
Run JS tests and publish alpha versions	22m 3s
Code formatting (rustfmt)	16s
Tests on ubuntu-latest	5m 21s
Tests on windows-latest	10m 52s
Test JNI(Android) bindings	4m 23s
Tests on macOS-latest	5m 24s
	1h 19m 15s

Provide feedback