add change log (#19)

CHANGES.md

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+# Change log for com.rickbusarow.dispatcherprovider
+
+## Version 1.0.0-beta02
+
+### Test features
+
+* Added `TestBasicDispatcherProvider` factory which uses `CommonPool` for `default` and `io`, but a shared single-threaded `ExecutorCoroutineDispatcher` for `main` and `mainImmediate` to provide "natural" dispatch behavior in tests without `Dispatchers.setMain(...)`.
+
+### Bug fixes and improvements
+
+* `runBlockingTestProvided` now uses the same `TestCoroutineDispatcher` as its `ContinuationInterceptor` and in its `TestDispatcherProvider` (#15). 
+* `runBlockingProvided` now uses `TestBasicDispatcherProvider` as its `DispatcherProvider`.
+
+## Version 1.0.0-beta01
+
+### Flow
+
+* Add non-suspending `flowOn___()` operators for the `Flow` api.
+
+### Misc
+
+* Lots of Kdocs.
+* Maven artifacts.
+* Lower JDK version to 1.6