bigquery sample using old release

[TomGoBravo]

java-docs-samples bigquery/pom.xml says

    <dependency>
        <groupId>com.google.apis</groupId>
        <artifactId>google-api-services-bigquery</artifactId>
        <version>v2-rev158-1.19.0</version>
    </dependency>

while developers.google.com/api-client-library says it should be

    <dependency>
      <groupId>com.google.apis</groupId>
      <artifactId>google-api-services-bigquery</artifactId>
      <version>v2-rev261-1.21.0</version>
    </dependency>