bump version to 2.7.0-SNAPSHOT

README.md

@@ -109,7 +109,7 @@ For snapshots, add the following to your pom.xml file:
     <dependency>
       <groupId>org.knowm.xchart</groupId>
       <artifactId>xchart</artifactId>
-      <version>2.6.2-SNAPSHOT</version>
+      <version>2.7.0-SNAPSHOT</version>
     </dependency>
 ```
 

pom.xml

@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.knowm.xchart</groupId>
 	<artifactId>xchart-parent</artifactId>
-	<version>2.6.2-SNAPSHOT</version>
+	<version>2.7.0-SNAPSHOT</version>
 	<packaging>pom</packaging>
 	<name>XChart Parent</name>
 	<description>XChart is a light weight Java library for plotting data.</description>