v0.3.0

• String path parameters no longer break route matching (#27): every string
  of a path value is generated non-empty and without / or \ at any
  nesting level, enum members no template segment can carry are dropped
  (an all-unsafe enum or const fails closed), and a uri/uri-reference/
  url path format fails closed at compile time.
• readOnly properties are no longer generated into request bodies (#28):
  Internal\RequestSchemas mirrors ResponseSchemas for the request
  direction (JSON, form and multipart bodies), and document examples lose
  their readOnly members the same way.
• OAS 3.0 nullable parameters never travel as the string null (#29):
  nullable, null enum members and a null const are dropped from
  parameter schemas at every nesting level (null is the absent branch of an
  optional parameter).
• allOf merge fails closed when a branch bounding additionalProperties
  does not declare every property a sibling branch adds (#30); the merged
  generator is checked against the contract validator in the test suite.
• Declared non-JSON responses (text/plain, application/octet-stream, …)
  are no longer red on every trial (#31): requires rasuvaeff/openapi-contract
^0.2.1, which treats them as opaque or validates the raw payload against
  a string-typed schema; only response.body.unsupported remains a
  violation.
• Psr15Transport populates the server request like the SAPI (#32):
  queryParams, cookieParams, parsedBody for form-urlencoded and
  multipart bodies, and uploadedFiles for multipart parts with a filename
  when a StreamFactoryInterface and an UploadedFileFactoryInterface are
  passed as the new optional fourth and fifth constructor arguments. The
  materializer emits filename="<part>" for binary multipart parts.
• Unsatisfiable schema combinations fail closed at compile time instead of
  exhausting the generator at run time (#33): pattern combined with an
  asserted format; a length window outside the format's length band
  (including maxLength: 0); uniqueItems over a finite item domain smaller
  than minItems; a not type predicate covering every declared type.
  Fractional bounds on integers now round inward instead of failing, and an
  open number bound steps inside by a quarter of a narrow window instead of a
  fixed 0.1.
• Response headers are serialized with the simple style (#34):
  percent-encoded values, lists joined with commas, so control characters no
  longer throw from the PSR-7 factory and commas inside an item survive.
• Fail-closed strictness: the direction views no longer drop malformed
  properties entries silently; the compiler reports them as before.
• SchemaArbitraryCompiler, SecuritySelector, RequestReproducer and
  DocumentExamples are now @internal; reach them through
  RequestCaseArbitrary/ResponseCaseArbitrary and ContractSuite.
• README: supported schema keyword matrix, transport parsed-body semantics,
  and a note that generated traffic targets the document's own servers.
• Dev/packaging: minimum-stability: dev removed; testo/testo ^0.10.39.