Update changelog, and README to highlight removal of FakeTimeSource.

CHANGELOG.md

@@ -1,10 +1,11 @@
 # Change Log
 
-## 0.6.0
+## Unreleased
 
 ### Changed
 
-- Time Source can be provided externally
+- `fakeTimeSource` in `Cache.Builder` has been renamed to `timeSource`, and the `FakeTimeSource` implementation has been removed (still available in our tests) - [#20](https://github.com/ReactiveCircus/cache4k/pull/20)
+- Kotlin 1.6.21.
 
 ## 0.5.0
 

README.md

@@ -196,7 +196,7 @@ cache.invalidateAll()
 
 ### Unit testing cache expirations
 
-To test logic that depends on cache expiration, pass in a `FakeTimeSource` when building a `Cache`
+To test logic that depends on cache expiration, pass in a fake `TimeSource` implementation when building a `Cache`
 so you can programmatically advance the reading of the time source:
 
 ```kotlin
@@ -224,6 +224,8 @@ fun cacheEntryEvictedAfterExpiration() {
 }
 ```
 
+A sample `FakeTimeSource` implementation can be found in [our tests](https://github.com/ReactiveCircus/cache4k/blob/8376a5f6198b3d8f82f42184fd1cabe4aa08e754/cache4k/src/commonTest/kotlin/io/github/reactivecircus/cache4k/FakeTimeSource.kt).
+
 ## Credits
 
 The library was ported from a kotlin / JVM cache which I contributed to [dropbox/Store](https://github.com/dropbox/Store) to help unblock Store's multiplatform support (

cache4k/src/commonTest/kotlin/io/github/reactivecircus/cache4k/FakeTimeSource.kt

@@ -12,7 +12,7 @@ import kotlin.time.DurationUnit
  *
  * Implementation is identical to [kotlin.time.TestTimeSource] except the internal [reading] is an [AtomicLong].
  */
-public class FakeTimeSource : AbstractLongTimeSource(unit = DurationUnit.NANOSECONDS) {
+class FakeTimeSource : AbstractLongTimeSource(unit = DurationUnit.NANOSECONDS) {
 
     private val reading = atomic(0L)