deps: bump Spanner client lib to 6.21 (#54)

Author: olavloite

pom.xml

@@ -24,7 +24,6 @@
  </properties>
 
  <modelVersion>4.0.0</modelVersion>
- <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-spanner-pgadapter</artifactId>
  <version>0.1.0-SNAPSHOT</version>
  <name>Google Cloud Spanner PostgreSQL Adapter</name>
@@ -50,7 +49,7 @@
  <dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-spanner</artifactId>
- <version>6.20.0</version>
+ <version>6.21.0</version>
  </dependency>
  <dependency>
  <groupId>org.postgresql</groupId>
@@ -76,27 +75,27 @@
  <dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-spanner</artifactId>
- <version>6.20.0</version>
+ <version>6.21.0</version>
  <type>test-jar</type>
  <scope>test</scope>
  </dependency>
  <dependency>
  <groupId>com.google.api</groupId>
  <artifactId>gax-grpc</artifactId>
- <version>2.11.0</version>
+ <version>2.12.2</version>
  <classifier>testlib</classifier>
  <scope>test</scope>
  </dependency>
  <dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
- <version>4.13</version>
+ <version>4.13.2</version>
  <scope>test</scope>
  </dependency>
  <dependency>
  <groupId>org.mockito</groupId>
  <artifactId>mockito-core</artifactId>
- <version>3.2.4</version>
+ <version>4.3.1</version>
  <scope>test</scope>
  </dependency>
  </dependencies>