Add expr.MaxNodes() option (#799)

* Add expr.MaxNodes() option

* Fix error message

* Add more tests and comments

Add check for non struct types to fetchField (#794)

Co-authored-by: yigitkanbalci <[email protected]>

fix(785): `get` to work when return is `nil` (#786)

* fix(785): `get` to work when return is `nil`

* improve testing

Make expr.Eval faster (#775)

* Make expr.Eval faster

* Add bench_call_test.go

* Make parser config optional

Fix parsing of variable declaration nodes combined with sequence node (…

…#773)

Fixes #772

Code style: remove repeated helper functions

Fix coverage reporting

Add Melrōse to "Who uses Expr?" section

Co-authored-by: Anton Medvedev <[email protected]>

Improve now() and date() validation

Remove implicit date's timezone set on parse