- ParseRepresentation -> UnmarshalRepresentation: change signature
so it matches json.Unmarshal style
- implement Representation.Unmarshal: alias to UnmarshalRepresentation
- update JSON accordingly

- remove Config.Override, Config.WithFields,
  Config.Equal
- remove related tests
- update tests relying on removed Config methods

Unmarshal -> ParseInto

- run go mod tidy

- module github.com/benchttp/engine -> github.com/benchttp/sdk
- package runner -> benchttp

Irrelevant method, use Runner.OnProgress instead.

- simplify with less declarations
- move into fie runner.go
- more accurate docs

Allows convenient chaining, e.g. when using de default runner:
DefaultRunner().WithNewRequest("", "http://a.b", nil).Run(ctx)

- Runner.WithRequest
- Runner.WithNewRequest

- implement AssertEqualRunners, EqualRunners, DiffRunner
- Unit test exposed functions

from benchttp/cli

Rethink exposed API so it matches the native json lib.

- replace Parse -> Decode in all declarations and file names
- expose top-level unmarshaling & decoding functions:
  - UnmarshalJSON, UnmarshalYAML: unmarshal bytes into *Representation
  - UnmarshalJSONRunner, UnmarshalYAMLRunner: same into *benchttp.Runner
  - NewJSONDecoder, NewYAMLDecoder: same as json.NewDecoder
  - DecoderOf: returns appropriate Decoder given an extension

Clarity over humor

- make testdata more robust easy to reason about using a dedicated
  package
- use table testing
- use benchttptest for runner comparison
- extract assertXxx helpers

Do not expose testdata.

- use dedicated data structure (file)
- rethink namings
- move functions to appropriate places

…ilder"

This reverts commit 731547e.

Previous benchmarks showed 2.5x better performance over piped modifier.

- Builder.Into -> Builder.Mutate
- Builder.modifiers -> Builder.mutations

- configio.Representation -> configio.representation
- make all representation methods private

- remove Decode methods from interface Decoder and its implementations
- rename DecodeRunner methods to Decode
- remove UnmarshalXXXX functions
- rename UnmarshalXXXXRunner functions to UnmarshalXXXX

- configio.representation -> configio/internal/Repr
- expose necessary methods

todo:
- configio: decoder API
- conversion: decode: fix nil pointer derefence
- conversion: separate encode/decode
  (use dedicated pointerless structure for encode?)
- body: to encode or not to encode (alters request)
- yaml encode
- various refactoring