Upgrade to RxJava2 2.2.21

wilkinsona · wilkinsona · commit d0280f1d8104 · 2021-02-17T13:57:40.000Z
Closes gh-25332
diff --git a/spring-boot-project/spring-boot-dependencies/build.gradle b/spring-boot-project/spring-boot-dependencies/build.gradle
@@ -1429,7 +1429,7 @@ bom {
 			]
 		}
 	}
-	library("RxJava2", "2.2.20") {
+	library("RxJava2", "2.2.21") {
 		group("io.reactivex.rxjava2") {
 			modules = [
 				"rxjava"
