feat: allow to use custom data for template interpolation

Author: egoist

lib/runActions.js

@@ -68,9 +68,16 @@ module.exports = async (config, context) => {
               transformer.render(
                 contents,
                 config.transformerOptions,
-                Object.assign({}, context.answers, {
-                  context
-                })
+                Object.assign(
+                  {},
+                  context.answers,
+                  typeof config.templateData === 'function'
+                    ? config.templateData.call(context, context)
+                    : config.templateData,
+                  {
+                    context
+                  }
+                )
               ).body
             )
           })