Release v0.16.0

Renamed Ppx_inline_test_runner.Runtime to Ppx_inline_test_runner
Renamed Ppx_inline_test_runner.Runtime.am_running_inline_test{,_env_var} to Ppx_inline_test_runner.am_running{,_env_var}
New tag let%test _ [@tags "disabled"] for tests that shouldn't run by default
Make the README state how to pass flags to the inline tests runner in jbuild/dune files
A bit of progress towards supporting running tests in parallel with dune (from @hhugo)

Old pre-v0.15 changelogs (very likely stale and incomplete)

Honor the inline_tests Dune variable so that inline tests are dropped in release builds

Depend on ppxlib instead of (now deprecated) ppx_core, ppx_driver and ppx_metaquot.

Changed the runtime API to make it easier to build test runners: replace the Runtime.Test_result.record system by Runtime.add_evaluator
Tell the build system via output metadata whether a file contains tests or not

Allow to configure hooks for inline tests by redefining a module Inline_test_config.

Support literate-style .ml files that allow ocaml code interleaved with expected output annotations. Compiling with the ppx_expect_test generates a program that outputs the original source file, but with the actual output substituted for the expected-output annotations. Then we can pat-diff the original file against the output file.

Testing

Examples in the test/ and example/ folders.
Expect-tests can now be written inline in libraries by using let%expect_test.

The runtime library has been split into two components: the test runner, which collects the output of the test body, and registers enough information to construct the *.ml.corrected file from the input; and the test evaluator, which compares the test output against the expected output and generates the output files.
Update to follow Ppx_core evolution.
When an exception is raised inside a let%test_module, display the position and name of the TEST_MODULE, same as for the let%test.
Mark attributes as handled inside explicitly dropped pieces of code.

So that a @@deriving inside a let%test dropped by ppx_inline_test_drop doesn't cause a failure.