deps: update google-cloud-conformance-tests to 0.2.0 (#752)

Opening in favor of #749

Author: kolea2

google-cloud-firestore/pom.xml

@@ -142,8 +142,14 @@
  <dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-conformance-tests</artifactId>
- <version>0.1.1</version>
+ <version>0.2.0</version>
  <scope>test</scope>
+ <exclusions>
+ <exclusion>
+ <groupId>org.checkerframework</groupId>
+ <artifactId>checker-qual</artifactId>
+ </exclusion>
+ </exclusions>
  </dependency>
  <dependency>
  <groupId>org.apache.commons</groupId>