fix: upgrade to Spring Boot 2.1.3.RELEASE (#87)

Author: igdianov

graphql-jpa-query-build/pom.xml

@@ -15,7 +15,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>2.1.0.RELEASE</version>
+                <version>2.1.3.RELEASE</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>