Added CHANGELOG.md

Author: rozza

CHANGELOG.md

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+# MongoDB Kafka Connector
+
+## Changelog
+
+## 1.0.1
+  - [KAFKA-86](https://jira.mongodb.org/browse/KAFKA-86) Fixed Source connector resumability error.
+  - [KAFKA-85](https://jira.mongodb.org/browse/KAFKA-85) Fixed Source connector IllegalStateException: Queue full when copying data.
+  - [KAFKA-83](https://jira.mongodb.org/browse/KAFKA-83) Fixed Source connector cursor resumability when filtering operationTypes.
+  
+## 1.0.0
+
+The initial GA release.