Check for observer being undefined in notifyPaths function (#172)

* Check for observer being undefined in `notifyPaths` function

* Added changeset

* Installed danger

* Added dangerfile.js

.changeset/eleven-lamps-wash.md

@@ -0,0 +1,5 @@
+---
+'stocked': patch
+---
+
+Fixed error in notifyPaths - observer could be undefined

.eslintignore

@@ -1,3 +1,4 @@
 node_modules
 dist
-*.config.js
+*.config.js
+dangerfile.js

.vscode/settings.json

@@ -1,6 +1,6 @@
 {
 	"typescript.tsdk": "node_modules\\typescript\\lib",
 	"editor.codeActionsOnSave": {
-		"source.fixAll": true
+		"source.fixAll": "explicit"
 	}
 }

dangerfile.js

@@ -0,0 +1,7 @@
+const { danger, fail } = require('danger');
+
+const changesets = danger.git.fileMatch('.changeset/*.md');
+
+if (!changesets.created) {
+	fail('No changesets has been added in you pull request!');
+}

package.json

@@ -44,6 +44,7 @@
 		"@typescript-eslint/parser": "^4.9.0",
 		"aqu": "^0.3.2",
 		"configs": "github:fracht/configs",
+		"danger": "^11.3.1",
 		"eslint-config-prettier": "^8.3.0",
 		"eslint-config-react-app": "^6.0.0",
 		"eslint-plugin-react-hooks": "^4.2.0",