Changing test schema scalar from Long to Float due to the Long scalar being removed from graphql-java-15 and out to graphql-java-extended-scalars (ref https://github.com/graphql-java/graphql-java/releases/tag/v15.0)

Author: setchy

graphql-spring-boot-test/src/test/resources/test-schema.graphqls

@@ -1,10 +1,8 @@
-scalar Long
-
 type Subscription {
-    timer: Long!
+    timer: Float!
     subscriptionWithParameter(param: String!): String!
     subscriptionWithInitPayload: String!
-    subscriptionThatTimesOut: Long!
+    subscriptionThatTimesOut: Float!
     subscriptionThatThrowsException: Boolean!
 }