Update dependencies and plugin versions to support Java 9.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=179690614

Author: netdpb

pom.xml

@@ -15,41 +15,42 @@
   <description>Utilities for testing compilation.</description>
 
   <properties>
-    <auto-common.version>0.9</auto-common.version>
-    <auto-value.version>1.5</auto-value.version>
-    <guava.version>23.1-jre</guava.version>
-    <truth.version>0.36</truth.version>
-    <junit.version>4.12</junit.version>
-    <jsr305.version>3.0.1</jsr305.version>
+    <truth.version>0.37</truth.version>
   </properties>
 
   <url>http://github.com/google/compile-testing</url>
+
   <issueManagement>
     <system>GitHub</system>
     <url>http://github.com/google/compile-testing/issues</url>
   </issueManagement>
+
   <inceptionYear>2013</inceptionYear>
+
   <licenses>
     <license>
       <name>The Apache Software License, Version 2.0</name>
       <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
       <distribution>repo</distribution>
     </license>
   </licenses>
+
   <prerequisites>
-    <maven>3.1.1</maven>
+    <maven>3.5.0</maven>
   </prerequisites>
+
   <scm>
     <connection>scm:git:http://github.com/google/compile-testing</connection>
     <developerConnection>scm:git:[email protected]:google/compile-testing.git</developerConnection>
     <url>http://github.com/google/compile-testing</url>
     <tag>HEAD</tag>
   </scm>
+
   <dependencies>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>${junit.version}</version>
+      <version>4.12</version>
     </dependency>
     <dependency>
       <groupId>com.google.truth</groupId>
@@ -64,58 +65,70 @@
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>${guava.version}</version>
+      <version>23.5-jre</version>
     </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>jsr305</artifactId>
-      <version>${jsr305.version}</version>
+      <version>3.0.2</version>
       <optional>true</optional>
     </dependency>
     <dependency>
       <groupId>com.google.errorprone</groupId>
       <artifactId>error_prone_annotations</artifactId>
-      <version>2.0.8</version>
+      <version>2.1.3</version>
       <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>com.google.auto.value</groupId>
       <artifactId>auto-value</artifactId>
-      <version>${auto-value.version}</version>
+      <version>1.5.3</version>
     </dependency>
     <dependency>
       <groupId>com.google.auto</groupId>
       <artifactId>auto-common</artifactId>
-      <version>${auto-common.version}</version>
+      <version>0.9</version>
     </dependency>
   </dependencies>
+
   <build>
     <plugins>
       <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.1</version>
+        <version>3.7.0</version>
         <configuration>
           <source>1.8</source>
           <target>1.8</target>
           <compilerArgument>-Xlint:all</compilerArgument>
           <showWarnings>true</showWarnings>
           <showDeprecation>true</showDeprecation>
         </configuration>
+        <dependencies>
+          <dependency>
+            <groupId>org.codehaus.plexus</groupId>
+            <artifactId>plexus-java</artifactId>
+            <version>0.9.5</version>
+          </dependency>
+        </dependencies>
       </plugin>
       <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-release-plugin</artifactId>
-        <version>2.5.1</version>
+        <version>2.5.3</version>
         <configuration>
           <releaseProfiles>release</releaseProfiles>
           <goals>deploy</goals>
         </configuration>
       </plugin>
       <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-jar-plugin</artifactId>
-        <version>2.5</version>
+        <version>3.0.2</version>
       </plugin>
     </plugins>
   </build>
+
   <profiles>
     <profile>
       <id>tools-jar</id>
@@ -163,8 +176,9 @@
       <build>
         <plugins>
           <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-gpg-plugin</artifactId>
-            <version>1.4</version>
+            <version>1.6</version>
             <executions>
               <execution>
                 <id>sign-artifacts</id>
@@ -174,8 +188,9 @@
             </executions>
           </plugin>
           <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-source-plugin</artifactId>
-            <version>2.1.2</version>
+            <version>3.0.1</version>
             <executions>
               <execution>
                 <id>attach-sources</id>
@@ -184,8 +199,9 @@
             </executions>
           </plugin>
           <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-javadoc-plugin</artifactId>
-            <version>2.8</version>
+            <version>3.0.0</version>
             <executions>
               <execution>
                 <id>attach-docs</id>