fix: make feel=static the default but value for inputs and outputs

This reverts the breaking changes introduced via [#154](#154) and [#156](#156). Any `feel` value out of the supported enum is allowed, but `static` is used if the property is missing.

Related to camunda/camunda-modeler#4593

Author: barmac

packages/zeebe-element-templates-json-schema/CHANGELOG.md

@@ -6,6 +6,14 @@ All notable changes to [@camunda/zeebe-element-templates-json-schema](https://gi
 
 ___Note:__ Yet to be released changes appear here._
 
+## 0.22.3
+
+* `FIX`: make `feel=static` the default but value for `zeebe:input` and `zeebe:output` properties
+
+### Notes
+
+This release reverts the breaking changes introduced via [#154](https://github.com/camunda/element-templates-json-schema/pull/154) and [#156](https://github.com/camunda/element-templates-json-schema/pull/156). Any `feel` value out of the supported enum is allowed, but `static` is used if the property is missing.
+
 ## 0.22.2
 
 * `FIX`: require `feel` to be `optional` or `static` for `Boolean` and `Number` inputs and outputs ([#156](https://github.com/camunda/element-templates-json-schema/pull/156))

packages/zeebe-element-templates-json-schema/src/defs/properties.json

@@ -337,17 +337,16 @@
               "required": ["binding", "type"]
             },
             "then": {
-              "required": ["feel"],
               "properties": {
                 "feel": {
-                  "enum": [ "optional", "static" ]
+                  "default": "static"
                 }
               }
             }
           }
         ]
       }
-      
+
     ],
     "properties": {
       "binding": {