Upgrade to Spring Framework 5.3.20.

Closes gh-692

Author: mp911de

pom.xml

@@ -27,7 +27,7 @@
 		<kotlin-coroutines.version>1.6.0</kotlin-coroutines.version>
 		<mockk.version>1.10.3-jdk8</mockk.version>
 		<mockito-core.version>3.8.0</mockito-core.version>
-		<spring.version>5.3.5</spring.version>
+		<spring.version>5.3.20</spring.version>
 		<spring-data-bom.version>2020.0.5</spring-data-bom.version>
 		<spring-security-bom.version>5.4.5</spring-security-bom.version>
 		<reactor.version>2020.0.13</reactor.version>

spring-vault-core/src/main/java/org/springframework/vault/support/Certificate.java

@@ -31,8 +31,8 @@
 
 /**
  * Value object representing a certificate consisting of the certificate and the issuer
- * certificate. Certificate and keys can be either DER or PEM (including PEM bundle) encoded.
- * Certificates can be obtained as {@link X509Certificate}.
+ * certificate. Certificate and keys can be either DER or PEM (including PEM bundle)
+ * encoded. Certificates can be obtained as {@link X509Certificate}.
  *
  * @author Mark Paluch
  * @since 2.0