v0.16.2

• Fix. A violation of a declared property whose name is numeric ("1") no longer comes with a spurious additionalProperties violation at the object root (#182).
• Tests. Mutation testing now counts code no test names (infection --with-uncovered),
  and the minMsi gate of 92 holds on the larger mutant set (3387 mutants). Added table-driven tests for the malformed-document refusals, the schema compiler
  refusals, the form and multipart body decoders, DecimalMultiple, the violation fields of
  response validation, path template matching and the discriminated-union branches. src/
  behaviour is unchanged; four signatures were split over several lines and the root servers
  default moved from a parameter default into the method body.