update more deps

package.json

@@ -40,11 +40,11 @@
   "homepage": "https://github.com/sveltejs/svelte#README",
   "devDependencies": {
     "@types/mocha": "^2.2.41",
-    "@types/node": "^7.0.22",
-    "acorn": "^4.0.4",
+    "@types/node": "^8.0.17",
+    "acorn": "^5.1.1",
     "babel": "^6.23.0",
     "babel-core": "^6.23.1",
-    "babel-plugin-istanbul": "^3.0.0",
+    "babel-plugin-istanbul": "^4.1.4",
     "babel-plugin-transform-es2015-arrow-functions": "^6.22.0",
     "babel-plugin-transform-es2015-block-scoping": "^6.23.0",
     "babel-plugin-transform-es2015-destructuring": "^6.23.0",
@@ -53,11 +53,11 @@
     "babel-plugin-transform-es2015-spread": "^6.22.0",
     "babel-preset-env": "^1.2.1",
     "babel-register": "^6.23.0",
-    "chalk": "^1.1.3",
-    "codecov": "^1.0.1",
+    "chalk": "^2.0.1",
+    "codecov": "^2.2.0",
     "console-group": "^0.3.2",
     "css-tree": "1.0.0-alpha16",
-    "eslint": "^3.12.2",
+    "eslint": "^4.3.0",
     "eslint-plugin-html": "^3.0.0",
     "eslint-plugin-import": "^2.2.0",
     "estree-walker": "^0.5.0",
@@ -68,7 +68,7 @@
     "magic-string": "^0.22.3",
     "mocha": "^3.2.0",
     "node-resolve": "^1.3.3",
-    "nyc": "^10.0.0",
+    "nyc": "^11.1.0",
     "prettier": "^1.4.1",
     "reify": "^0.4.4",
     "rollup": "^0.45.2",