Restrict 3rd party starters to 1.5

Closes gh-411

initializr-service/src/main/resources/application.yml

@@ -283,7 +283,7 @@ initializr:
           groupId: io.ratpack
           artifactId: ratpack-spring-boot
           version: 1.1.1
-          versionRange: 1.2.0.RELEASE
+          versionRange: "[1.2.0.RELEASE,2.0.0.M1)"
           starter: false
         - name: Vaadin
           id: vaadin
@@ -433,6 +433,7 @@ initializr:
               href: http://docs.spring.io/spring-boot/docs/{bootVersion}/reference/htmlsingle/#boot-features-jooq
         - name: MyBatis
           id: mybatis
+          versionRange: "[1.3.0.RELEASE,2.0.0.M1)"
           description: Persistence support using MyBatis
           groupId: org.mybatis.spring.boot
           artifactId: mybatis-spring-boot-starter
@@ -982,12 +983,14 @@ initializr:
               href: http://docs.spring.io/spring-boot/docs/{bootVersion}/reference/htmlsingle/#boot-features-integration
         - name: Activiti
           id: activiti-basic
+          versionRange: "[1.2.0.RELEASE,2.0.0.M1)"
           description: Activiti BPMN workflow engine
           groupId: org.activiti
           artifactId: activiti-spring-boot-starter-basic
           version: 5.21.0
         - name: Apache Camel
           id: camel
+          versionRange: "[1.2.0.RELEASE,2.0.0.M1)"
           description: Integration using Apache Camel
           groupId: org.apache.camel
           artifactId: camel-spring-boot-starter