Bump spring-context from 5.3.19 to 5.3.21 (#47)

Bumps [spring-context](https://github.com/spring-projects/spring-framework) from 5.3.19 to 5.3.21.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.19...v5.3.21)

---
updated-dependencies:
- dependency-name: org.springframework:spring-context
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

pom.xml

@@ -84,7 +84,7 @@
 		<dependency>
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-context</artifactId>
-			<version>5.3.19</version>
+			<version>5.3.21</version>
 			<scope>provided</scope>
 		</dependency>