Bump aws-encryption-sdk-java from 1.7.0 to 2.2.0 (#393)

Bumps [aws-encryption-sdk-java](https://github.com/aws/aws-encryption-sdk-java) from 1.7.0 to 2.2.0.
- [Release notes](https://github.com/aws/aws-encryption-sdk-java/releases)
- [Changelog](https://github.com/aws/aws-encryption-sdk-java/blob/master/CHANGELOG.md)
- [Commits](aws/aws-encryption-sdk-java@v1.7.0...v2.2.0)

---
updated-dependencies:
- dependency-name: com.amazonaws:aws-encryption-sdk-java
  dependency-type: direct:production
...

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pom.xml

@@ -136,7 +136,7 @@
         <dependency>
             <groupId>com.amazonaws</groupId>
             <artifactId>aws-encryption-sdk-java</artifactId>
-            <version>1.7.0</version>
+            <version>2.2.0</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-sts -->
         <dependency>