Bump com.google.appengine:appengine-api-1.0-sdk (#3118)

Bumps [com.google.appengine:appengine-api-1.0-sdk](https://github.com/GoogleCloudPlatform/appengine-java-standard) from 1.9.82 to 2.0.16.
- [Release notes](https://github.com/GoogleCloudPlatform/appengine-java-standard/releases)
- [Commits](https://github.com/GoogleCloudPlatform/appengine-java-standard/commits/v2.0.16)

---
updated-dependencies:
- dependency-name: com.google.appengine:appengine-api-1.0-sdk
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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migrator/migrator-servlet/pom.xml

@@ -25,7 +25,7 @@
     <dependency>
       <groupId>com.google.appengine</groupId>
       <artifactId>appengine-api-1.0-sdk</artifactId>
-      <version>1.9.82</version>
+      <version>2.0.16</version>
     </dependency>
     <dependency>
       <groupId>javax.servlet</groupId>