Ensure Dependabot is working

* dependabot.yml
* Move dependency version properties to build.gradle since dependabot
can't update other files

.github/dependabot.yml

@@ -0,0 +1,25 @@
+version: 2
+updates:
+  - package-ecosystem: gradle
+    directory: "/"
+    target-branch: "main"
+    schedule:
+      interval: weekly
+    labels:
+      - dependencies
+
+  - package-ecosystem: gradle
+    directory: "/"
+    target-branch: "1.2.x"
+    schedule:
+      interval: weekly
+    labels:
+      - dependencies
+
+  - package-ecosystem: gradle
+    directory: "/"
+    target-branch: "1.1.x"
+    schedule:
+      interval: weekly
+    labels:
+      - dependencies

build.gradle

@@ -16,8 +16,25 @@ import java.util.concurrent.ConcurrentHashMap
  * limitations under the License.
  */
 
+buildscript {
+	ext {
+		awaitilityVersion = "4.0.2"
+		blockHoundVersion = "1.0.4.RELEASE"
+		cfJavaClientVersion = "5.6.0.RELEASE"
+		checkstyleVersion = "8.37"
+		commonsTextVersion = "1.8"
+		immutablesVersion = "2.8.8"
+		openServiceBrokerVersion = "3.3.0"
+		pmdVersion = "6.29.0"
+		springBootVersion = "2.4.3"
+		springCredhubVersion = "2.1.1.RELEASE"
+		springFrameworkVersion = "5.3.4"
+		wiremockVersion = "2.27.2"
+	}
+}
+
 plugins {
-	id "io.spring.nohttp"
+	id "io.spring.nohttp" version "0.0.5.RELEASE"
 	id 'distribution'
 	id 'jacoco'
 }

gradle.properties

@@ -3,15 +3,3 @@ group=org.springframework.cloud
 
 onlyShowStandardStreamsOnTestFailure = false
 
-awaitilityVersion = 4.0.2
-blockHoundVersion = 1.0.4.RELEASE
-cfJavaClientVersion = 5.6.0.RELEASE
-checkstyleVersion = 8.37
-commonsTextVersion = 1.8
-immutablesVersion = 2.8.8
-openServiceBrokerVersion = 3.3.0
-pmdVersion = 6.29.0
-springBootVersion = 2.4.3
-springCredhubVersion = 2.1.1.RELEASE
-springFrameworkVersion = 5.3.4
-wiremockVersion = 2.27.2

settings.gradle

@@ -1,12 +1,3 @@
-pluginManagement {
-	plugins {
-		id "org.springframework.boot" version "${springBootVersion}"
-		id "io.spring.nohttp" version "0.0.5.RELEASE"
-		id 'org.asciidoctor.jvm.pdf' version '3.1.0'
-		id 'org.asciidoctor.jvm.convert' version '3.1.0'
-	}
-}
-
 rootProject.name = "spring-cloud-app-broker"
 
 include "spring-cloud-app-broker-deployer"

spring-cloud-app-broker-acceptance-tests/build.gradle

@@ -15,7 +15,7 @@
  */
 
 plugins {
-	id 'org.springframework.boot'
+	id 'org.springframework.boot' version "2.4.3"
 }
 
 description = "Spring Cloud App Broker Acceptance Tests"

spring-cloud-app-broker-docs/build.gradle

@@ -15,8 +15,8 @@
  */
 
 plugins {
-	id 'org.asciidoctor.jvm.pdf'
-	id 'org.asciidoctor.jvm.convert'
+	id 'org.asciidoctor.jvm.pdf' version '3.1.0'
+	id 'org.asciidoctor.jvm.convert' version '3.1.0'
 }
 
 description = "Spring Cloud App Broker Documentation"

spring-cloud-app-broker-integration-tests/build.gradle

@@ -15,7 +15,7 @@
  */
 
 plugins {
-	id 'org.springframework.boot'
+	id 'org.springframework.boot' version "2.4.3"
 }
 
 description = "Spring Cloud App Broker Integration Tests"