Upgrade to commons-text 1.8

Fixes gh-71

Author: kazuki43zoo

pom.xml

@@ -96,7 +96,7 @@
     <dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-text</artifactId>
-      <version>1.7</version>
+      <version>1.8</version>
     </dependency>
 
     <!-- TEST -->