ensure value exists before attempting to filter it's members (#94)

Author: danieldelcore

.changeset/nine-nails-visit/changes.json

@@ -0,0 +1 @@
+{ "releases": [{ "name": "extract-react-types", "type": "patch" }], "dependents": [] }

.changeset/nine-nails-visit/changes.md

@@ -0,0 +1 @@
+Enusre 'value' exists before attempting to filter its members

packages/extract-react-types/src/index.js

@@ -224,7 +224,7 @@ function convertReactComponentClass(path, context) {
    * to resolve type definitions of non-relative module imports
    * See: https://github.com/atlassian/extract-react-types/issues/89
    **/
-  if (classProperties.value.members) {
+  if (classProperties.value && classProperties.value.members) {
     classProperties.value.members = classProperties.value.members.filter(m => !!m);
   }