update minimum Java version

Author: siilike

build.gradle

@@ -41,7 +41,7 @@ task javadocJar(type: Jar) {
 group = 'com.arangodb'
 version = '1.4.3'
 description = 'ArangoDB Velocypack'
-sourceCompatibility = '1.8'
+sourceCompatibility = '1.7'
 
 publishing {
 	publications {

pom.xml

@@ -107,8 +107,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.2</version>
 				<configuration>
-					<source>1.6</source>
-					<target>1.6</target>
+					<source>1.7</source>
+					<target>1.7</target>
 					<compilerArgument></compilerArgument>
 				</configuration>
 			</plugin>