Documentation & code quality release.

This release focuses on redocumenting this package,
improving code quality, test coverage and CI automation.

Code quality patch:

* code modernization & relinting
* enhanced CI checks & automation
* more tests, including testable examples
* introduced first fuzz test

Merge pull request #59 from fredbi/chore/perf-minor-optimizations

perf: minor performance optimization for escape/unescape

deps: removed (indirect) dependency to mailru/easyjson

fixes #53

Signed-off-by: Frederic BIDON <[email protected]>

fix: prevent panic on nil intermediate values during Set operations

Add nil checks in setSingleImpl() and traversal loop to handle nil
intermediate values gracefully. Per RFC 6901 Section 7, implementations
must raise error conditions for unresolvable paths instead of panicking.

- Add isNil() check before reflection operations in setSingleImpl()
- Add nil validation in set() method traversal loop
- Return descriptive errors: "cannot set field X on nil value"
- Add comprehensive test cases for nil traversal scenarios

Fixes panic: "reflect: call of reflect.Value.Type on zero Value" when
traversing JSON paths containing nil intermediate values.

Signed-off-by: Matthew F Leader <[email protected]>

updated dependencies

Signed-off-by: Frederic BIDON <[email protected]>

chore(go): go-openapi requires go.1.20 across the board

Signed-off-by: Frederic BIDON <[email protected]>

updated dependencies

Signed-off-by: Frederic BIDON <[email protected]>

fix(GetForToken): added support for pointer to interface{}

reflect-based switch doesn't work when the value passed is *any:
the resulting indirection is typed as reflect.Interface and not
the actual underlying type.

* added more stringent checking on nil values (i.e. covers
  interface{}(nil)
* contributes: go-swagger/go-swagger#1898 (pointers to content of a
  x-... swagger extension)

Signed-off-by: Frederic BIDON <[email protected]>