Update versions of some plugins and a dependency to prepare for Java 11.

- We may want an ICU4J new enough to contain an Automatic-Module-Name.
- Our old maven-surefire-plugin breaks with NullPointerException with JDK10+: https://bugzilla.redhat.com/show_bug.cgi?id=1572708
- Our old maven-compiler-plugin breaks with JDK11: google/error-prone#1136 (comment) (I don't have the error message handy anymore.)

RELNOTES=n/a

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=272714574

pom.xml

@@ -103,7 +103,7 @@
       <dependency>
         <groupId>com.ibm.icu</groupId>
         <artifactId>icu4j</artifactId>
-        <version>61.1</version>
+        <version>65.1</version>
       </dependency>
 
       <!-- Compile-time dependencies -->
@@ -150,7 +150,7 @@
       <plugins>
         <plugin>
           <artifactId>maven-compiler-plugin</artifactId>
-          <version>3.7.0</version>
+          <version>3.8.0</version>
         </plugin>
         <plugin>
           <artifactId>maven-source-plugin</artifactId>
@@ -164,6 +164,10 @@
           <artifactId>maven-gpg-plugin</artifactId>
           <version>1.6</version>
         </plugin>
+        <plugin>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <version>3.0.0-M3</version>
+        </plugin>
         <plugin>
           <groupId>org.apache.felix</groupId>
           <artifactId>maven-bundle-plugin</artifactId>