Merge pull request scala#4853 from SethTisue/mima-upgrade

upgrade to MiMa 0.1.8

Author: lrytz

build.xml

@@ -1642,7 +1642,7 @@ TODO:
     <mkdir dir="${bc-build.dir}"/>
     <!-- Pull down MIMA -->
     <artifact:dependencies pathId="mima.classpath">
-      <dependency groupId="com.typesafe" artifactId="mima-reporter_2.10" version="0.1.6"/>
+      <dependency groupId="com.typesafe" artifactId="mima-reporter_2.10" version="0.1.8"/>
     </artifact:dependencies>
     <artifact:dependencies pathId="old.bc.classpath">
       <dependency groupId="org.scala-lang" artifactId="scala-library" version="${bc-reference-version}"/>