fix line endings on Windows

Author: Gaurav0

.gitattributes

@@ -0,0 +1 @@
+text=auto

packages/fastboot-express-middleware/.eslintrc.js

@@ -9,6 +9,14 @@ module.exports = {
     node: true,
     es6: true,
   },
+  rules: {
+    "prettier/prettier": [
+      "error",
+      {
+        endOfLine: "auto",
+      }
+    ]
+  },
   overrides: [
     {
       files: ['test/**/*-test.js'],