simplify configs

.editorconfig

@@ -5,4 +5,5 @@ charset = utf-8
 indent_style = space
 indent_size = 2
 end_of_line = lf
-trim_trailing_whitespace = true
+insert_final_newline = true
+trim_trailing_whitespace = true

.github/dependabot.yml

@@ -0,0 +1,18 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: 'npm' # See documentation for possible values
+    directory: '/' # Location of package manifests
+    target-branch: 'dev'
+    schedule:
+      interval: 'weekly'
+
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    target-branch: 'dev'
+    schedule:
+      interval: 'weekly'