update maven-replacer-plugin version

@stefanbirkner
due to conversation https://github.com/junit-team/junit/pull/909, update replacer.

I have run 'mvn verify', all test passed.


-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running org.junit.tests.AllTests
Tests run: 823, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 8.184 sec - in org.junit.tests.AllTests

Results :

Tests run: 823, Failures: 0, Errors: 0, Skipped: 0

[INFO] 
[INFO] --- animal-sniffer-maven-plugin:1.11:check (signature-check) @ junit ---
[INFO] Checking unresolved references to org.codehaus.mojo.signature:java15:1.0
[INFO] 
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ junit ---
[INFO] Building jar: /Users/admin/Documents/code/junit/target/junit-4.12-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 31.780s
[INFO] Finished at: Fri May 09 19:33:45 CST 2014
[INFO] Final Memory: 9M/81M
[INFO] ------------------------------------------------------------------------