Move JRuby to provided scope

JRuby 10.0.5.0 is used to compile this library, but any version
after that should work fine. Moving this to "provided" scope
softens the dependency and avoids version convergence issues.

Author: headius

pom.xml

@@ -59,9 +59,10 @@
 
   <dependencies>
     <dependency>
-       <groupId>org.jruby</groupId>
-       <artifactId>jruby-base</artifactId>
-       <version>10.0.5.0</version>
+      <groupId>org.jruby</groupId>
+      <artifactId>jruby-base</artifactId>
+      <version>10.0.5.0</version>
+      <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>org.ruby-lang</groupId>