Convert qnumbers to lazy operators in to_numeric

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.23810% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 78.86%. Comparing base (9420b78) to head (8b99174).

Files	Patch %	Lines
src/utils.jl	94.73%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #191 +/- ## ========================================== + Coverage 78.81% 78.86% +0.04% ========================================== Files 26 26 Lines 5254 5271 +17 ========================================== + Hits 4141 4157 +16 - Misses 1113 1114 +1 ```

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