added changelog for version 0.9.0
+## [Version 0.9.0] - 2021-03-26
+- Changes in `eo-learn-io` tasks that interact with Sentinel Hub services:
+ * Added `SentinelHubEvalscriptTask` that downloads data given a user-defined evalscript.
+ * Removed all tasks that interact with Sentinel Hub OGC services. They are fully replaced by `SentinelHubInputTask` and `SentinelHubEvalscriptTask` which use [Sentinel Hub Process API](https://docs.sentinel-hub.com/api/latest/api/process/).
+ * Renamed `AddSen2CorClassificationFeature` to `SentinelHubSen2corTask`. Now it uses Process API instead of OGC.
+- Changes in Sentinel-2 cloud-masking tasks:
+ * Renamed `AddMultiCloudMaskTask` to `CloudMaskTask`.
+ * Removed `AddCloudMaskTask` as it is superseded by `CloudMaskTask`.
+ * Fixed problems with incompatibility with the latest `scikit-learn` version.
+- Updated all notebooks in `eo-learn` repository.
+- Minor fixes and improvements:
+ * better handling of `KeyboardInterrupt` in `EOExecutor`,
+ * fixed plotting of raster features with binary dtype,
+ * documentation fixes.
+
## [Version 0.8.1] - 2021-03-05
- Added [example use-case about creating a timelapse with batch processing](https://github.com/sentinel-hub/eo-learn/tree/master/examples/batch-processing/how_to_timelapse).
- Added [example use-case about crop type classification](https://github.com/sentinel-hub/eo-learn/tree/master/examples/crop-type-classification). Contributed by @Gnilliw
