Merge pull request #1675 from yuri-sakharov/fix/react-no-unused-prop-types

Fixed "PropType is defined but prop is never used  react/no-unused-prop-types"

Author: ljharb

lib/rules/no-unused-prop-types.js

@@ -266,7 +266,7 @@ module.exports = {
      * @return {Boolean} True if the node is inside a lifecycle method
      */
     function isInLifeCycleMethod(node) {
-      if (node.type === 'MethodDefinition' && isNodeALifeCycleMethod(node)) {
+      if ((node.type === 'MethodDefinition' || node.type === 'Property') && isNodeALifeCycleMethod(node)) {
         return true;
       }