Upgrade to Mimepull 1.9.13

Closes gh-20675

Author: snicoll

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -153,7 +153,7 @@
 		<lombok.version>1.18.12</lombok.version>
 		<mariadb.version>2.4.4</mariadb.version>
 		<micrometer.version>1.3.6</micrometer.version>
-		<mimepull.version>1.9.12</mimepull.version>
+		<mimepull.version>1.9.13</mimepull.version>
 		<mockito.version>3.1.0</mockito.version>
 		<mongo-driver-reactivestreams.version>1.12.0</mongo-driver-reactivestreams.version>
 		<mongodb.version>3.11.2</mongodb.version>