Use early overrides to allow converting unsupported types.

[smatric]

Describe the PR
Convert types using overrides before other checks are made. This makes it possible, for example, to replace all occurrences of sql.NullString with string. Without this feature, every field of unsupported type has to be tagged with swaggertype in parameter structs.

Relation issue
#1208

[codecov]

Codecov Report

Merging #1209 (9d035e9) into master (a780e45) will decrease coverage by 0.07%.
The diff coverage is 100.00%.

❗ Current head 9d035e9 differs from pull request most recent head a3c0947. Consider uploading reports for the commit a3c0947 to get more accurate results

@@            Coverage Diff             @@
##           master    #1209      +/-   ##
==========================================
- Coverage   94.90%   94.83%   -0.08%     
==========================================
  Files          14       14              
  Lines        2611     2614       +3     
==========================================
+ Hits         2478     2479       +1     
- Misses         73       74       +1     
- Partials       60       61       +1     

Impacted Files	Coverage Δ
parser.go	93.59% <100.00%> (+0.02%)	⬆️
packages.go	87.30% <0.00%> (-1.06%)	⬇️

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[ubogdan]

@smatric Good job. Would you mind writing unit tests to cover new code?

parser.go#L902-L903
Added lines #L902 - L903 were not covered by tests

[smatric]

Hi @ubogdan,
I added two tests that run getTypeSchema method with different parameters. One for defined and another for undefined overrides. Please see if they meet the standard.

[ubogdan]

LGTM

[ubogdan]

Please fix the conflict in parser.go.

[ubogdan]

LGTM

[ubogdan]

@smatric Thanks for your contribution.