Bump opensaml.version from 4.3.0 to 5.1.2

Bumps `opensaml.version` from 4.3.0 to 5.1.2.

Updates `org.opensaml:opensaml-saml-impl` from 4.3.0 to 5.1.2

Updates `org.opensaml:opensaml-xacml-impl` from 4.3.0 to 5.1.2

Updates `org.opensaml:opensaml-xacml-saml-impl` from 4.3.0 to 5.1.2

---
updated-dependencies:
- dependency-name: org.opensaml:opensaml-saml-impl
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.opensaml:opensaml-xacml-impl
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.opensaml:opensaml-xacml-saml-impl
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

pom.xml

@@ -89,7 +89,7 @@
     <slf4j.jboss.logging.version>1.2.1.Final</slf4j.jboss.logging.version>
     <neethi.version>3.2.0</neethi.version>
     <fastinfoset.version>2.1.1</fastinfoset.version>
-    <opensaml.version>4.3.0</opensaml.version>
+    <opensaml.version>5.1.2</opensaml.version>
     <saaj.api.version>1.0.0.Final</saaj.api.version>
     <saaj.impl.version>3.0.0</saaj.impl.version>
     <velocity.version>2.3</velocity.version>