Add some breaking changes

[github-actions[bot]]

Lines Of Code

Language	Files	Lines	Code	Comments	Blanks	Complexity	Bytes
Go	6	1187 (+4)	890 (+2)	52	245 (+2)	290	26.6K (+31B)
Go (test)	4	831	594	103	134	6	23K (+7B)

[github-actions[bot]]

Unit Test Coverage

total: (statements) 45.7%

Coverage diff with base branch

```diff 558c558,559 < github.com/swaggest/openapi-go/openapi3/reflect.go ResolveJSONSchemaRef 85.7% --- > github.com/swaggest/openapi-go/openapi3/reflect.go New 0.0% > github.com/swaggest/openapi-go/openapi3/reflect.go ResolveJSONSchemaRefRenamed 85.7% ```

[codecov[bot]]

Codecov Report

Merging #25 (d6b4565) into master (f3fc49f) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #25   +/-   ##
=======================================
  Coverage   37.59%   37.59%           
=======================================
  Files           5        5           
  Lines        3503     3503           
=======================================
  Hits         1317     1317           
  Misses       1897     1897           
  Partials      289      289           

Flag	Coverage Δ
unittests	37.59% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
openapi3/reflect.go	82.84% <ø> (ø)

---

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[github-actions[bot]]

Exported API Changes Report

# github.com/swaggest/openapi-go/openapi3
## incompatible changes
Reflector.ResolveJSONSchemaRef: removed
## compatible changes
New: added
Reflector.ResolveJSONSchemaRefRenamed: added

# summary
Inferred base version: v0.2.11
Suggested version: v0.3.0