Represent type(f) correctly in the ast

[seanyoung]

This makes the ast correct, and also the following code is now parsed correctly:

        function foo() {
                type(int);
        }

type(enum-type).min or type(enum).min is now supported.

This fixes all the issues wrt type(T) in the solc tests.

[codecov[bot]]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (68b59a4) 87.94% compared to head (e2819a3) 88.14%.

Files	Patch %	Lines
src/codegen/expression.rs	82.14%	5 Missing :warning:
src/sema/eval.rs	85.00%	3 Missing :warning:
src/sema/expression/member_access.rs	98.38%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1609 +/- ## ========================================== + Coverage 87.94% 88.14% +0.19% ========================================== Files 137 137 Lines 65902 65992 +90 ========================================== + Hits 57959 58166 +207 + Misses 7943 7826 -117 ```

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[seanyoung]

If there are no further comments, I'll merge