Add declarative recipe for JavaVersion17. (closes #115)

  - change java.version property to 17
  - change maven.compiler.source property to 17
  - change maven.compiler.target property to 17

src/main/resources/META-INF/rewrite/java-version-17.yml

@@ -0,0 +1,33 @@
+#
+# Copyright 2022 the original author or authors.
+# <p>
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+# <p>
+# https://www.apache.org/licenses/LICENSE-2.0
+# <p>
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+---
+type: specs.openrewrite.org/v1beta/recipe
+name: org.openrewrite.java.migrate.JavaVersion17
+displayName: Change Maven Java version property values to 17
+description: Change maven.compiler.source and maven.compiler.target values to 17.
+recipeList:
+  - org.openrewrite.maven.ChangePropertyValue:
+      key: java.version
+      newValue: 17
+      addIfMissing: false
+  - org.openrewrite.maven.ChangePropertyValue:
+      key: maven.compiler.source
+      newValue: 17
+      addIfMissing: false
+  - org.openrewrite.maven.ChangePropertyValue:
+      key: maven.compiler.target
+      newValue: 17
+      addIfMissing: false