Updated Spring Boot to v2.3.0.M2

Closes gh-85

pom.xml

@@ -9,7 +9,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.3.0.M1</version>
+		<version>2.3.0.M2</version>
 
 		<relativePath />
 	</parent>
@@ -104,7 +104,7 @@
 
 		<!-- Frameworks -->
 		<spring.framework.version>5.2.3.RELEASE</spring.framework.version>
-		<spring.security.version>5.2.1.RELEASE</spring.security.version>
+		<spring.security.version>5.3.0.RC1</spring.security.version>
 		<hibernate.validator.version>6.1.2.Final</hibernate.validator.version>
 		<jakarta.validation-api.version>2.0.2</jakarta.validation-api.version>