bump to java 1.8

Author: timmolter

README.md

@@ -21,7 +21,7 @@ uses a ThreadLocal wrapper for each job containing a HashMap for job key-value p
  * [x] or define jobs and triggers programmatically
  * [x] Cron Triggers
  * [x] Simple Triggers
- * [x] Java 7 and up
+ * [x] Java 8 and up
  * [x] Depends only on slf4j
 
 ## Create a Job Class

pom.xml

@@ -129,8 +129,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.10.1</version>
 				<configuration>
-					<source>1.7</source>
-					<target>1.7</target>
+					<source>1.8</source>
+					<target>1.8</target>
 					<showDeprecation>true</showDeprecation>
 					<showWarnings>true</showWarnings>
 				</configuration>