Bump ProtoData -> 0.91.0

Author: alexander-yevsyukov

buildSrc/src/main/kotlin/io/spine/dependency/local/ProtoData.kt

@@ -73,7 +73,7 @@ object ProtoData {
      * The version of ProtoData dependencies.
      */
     val version: String
-    private const val fallbackVersion = "0.90.2"
+    private const val fallbackVersion = "0.91.0"
 
     /**
      * The distinct version of ProtoData used by other build tools.
@@ -82,7 +82,7 @@ object ProtoData {
      * transitional dependencies, this is the version used to build the project itself.
      */
     val dogfoodingVersion: String
-    private const val fallbackDfVersion = "0.90.2"
+    private const val fallbackDfVersion = "0.91.0"
 
     /**
      * The artifact for the ProtoData Gradle plugin.