chore: update minimum java version to v17

Author: oliemansm

gradle.properties

@@ -16,7 +16,7 @@
 # DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 # FROM, OUT OF OR IN CONNECTION WITH THE  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #
-version=14.0.1-SNAPSHOT
+version=15.0.0-SNAPSHOT
 ### Project Metadata
 group=com.graphql-java-kickstart
 PROJECT_NAME=graphql-spring-boot
@@ -26,8 +26,8 @@ PROJECT_LICENSE=MIT
 PROJECT_LICENSE_URL=https://github.com/graphql-java-kickstart/spring-boot-graphql/blob/master/LICENSE.md
 VCS=Git
 ###
-SOURCE_COMPATIBILITY=1.8
-TARGET_COMPATIBILITY=1.8
+SOURCE_COMPATIBILITY=17
+TARGET_COMPATIBILITY=17
 ### Dependencies
 LIB_GRAPHQL_JAVA_VER=19.1
 LIB_EXTENDED_SCALARS_VER=18.1