deps: update core transport dependencies to v1.31.0 (#565)

Author: renovate-bot

samples/install-without-bom/pom.xml

@@ -52,12 +52,12 @@
     <dependency>
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client-java6</artifactId>
-      <version>1.30.6</version>
+      <version>1.31.0</version>
     </dependency>
     <dependency>
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client-jetty</artifactId>
-      <version>1.30.6</version>
+      <version>1.31.0</version>
     </dependency>
     <!-- Test dependencies -->
     <dependency>

samples/snapshot/pom.xml

@@ -50,12 +50,12 @@
     <dependency>
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client-java6</artifactId>
-      <version>1.30.6</version>
+      <version>1.31.0</version>
     </dependency>
     <dependency>
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client-jetty</artifactId>
-      <version>1.30.6</version>
+      <version>1.31.0</version>
     </dependency>
     <!-- Test dependencies -->
     <dependency>

samples/snippets/pom.xml

@@ -62,12 +62,12 @@
     <dependency>
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client-java6</artifactId>
-      <version>1.30.6</version>
+      <version>1.31.0</version>
     </dependency>
     <dependency>
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client-jetty</artifactId>
-      <version>1.30.6</version>
+      <version>1.31.0</version>
     </dependency>
     <!-- Test dependencies -->
     <dependency>