Bump spring.version from 5.1.1.RELEASE to 5.2.7.RELEASE

Bumps `spring.version` from 5.1.1.RELEASE to 5.2.7.RELEASE.

Updates `spring-core` from 5.1.1.RELEASE to 5.2.7.RELEASE
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.1.1.RELEASE...v5.2.7.RELEASE)

Updates `spring-web` from 5.1.1.RELEASE to 5.2.7.RELEASE
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.1.1.RELEASE...v5.2.7.RELEASE)

Updates `spring-context` from 5.1.1.RELEASE to 5.2.7.RELEASE
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.1.1.RELEASE...v5.2.7.RELEASE)

Updates `spring-webmvc` from 5.1.1.RELEASE to 5.2.7.RELEASE
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.1.1.RELEASE...v5.2.7.RELEASE)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -7,7 +7,7 @@
   <packaging>war</packaging>
   <name>A rapid tileserver using JNI bindings against mapnik 3.0.x</name>
   <properties>
-    <spring.version>5.1.1.RELEASE</spring.version>
+    <spring.version>5.2.7.RELEASE</spring.version>
     <geotools.version>20.0</geotools.version>
   </properties>
   <build>