update rollup

package.json

@@ -2,13 +2,12 @@
   "name": "sapper",
   "version": "0.17.1",
   "description": "Military-grade apps, engineered by Svelte",
-  "main": "dist/middleware.ts.js",
+  "main": "dist/middleware.js",
   "bin": {
     "sapper": "./sapper"
   },
   "files": [
     "*.js",
-    "*.ts.js",
     "runtime",
     "webpack",
     "sapper",
@@ -49,7 +48,7 @@
     "pretty-ms": "^3.1.0",
     "require-relative": "^0.8.7",
     "rimraf": "^2.6.2",
-    "rollup": "^0.59.2",
+    "rollup": "^0.65.0",
     "rollup-plugin-commonjs": "^9.1.3",
     "rollup-plugin-json": "^3.0.0",
     "rollup-plugin-node-resolve": "^3.3.0",