chore: Bump dev dependencies for template (vuejs-templates#790)

Author: sudo-suhas

template/package.json

@@ -18,25 +18,26 @@
     "vue-router": "^2.6.0"{{/router}}
   },
   "devDependencies": {
-    "autoprefixer": "^6.7.2",
+    "autoprefixer": "^7.1.2",
     "babel-core": "^6.22.1",
     {{#lint}}
     "babel-eslint": "^7.1.1",
     {{/lint}}
-    "babel-loader": "^6.2.10",
+    "babel-loader": "^7.1.1",
     "babel-plugin-transform-runtime": "^6.22.0",
     "babel-preset-env": "^1.3.2",
     "babel-preset-stage-2": "^6.22.0",
     "babel-register": "^6.22.0",
-    "chalk": "^1.1.3",
+    "chalk": "^2.0.1",
     "connect-history-api-fallback": "^1.3.0",
     "copy-webpack-plugin": "^4.0.1",
     "css-loader": "^0.28.0",
+    "cssnano": "^3.10.0",
     {{#lint}}
     "eslint": "^3.19.0",
-    "eslint-friendly-formatter": "^2.0.7",
+    "eslint-friendly-formatter": "^3.0.0",
     "eslint-loader": "^1.7.1",
-    "eslint-plugin-html": "^2.0.0",
+    "eslint-plugin-html": "^3.0.0",
     {{#if_eq lintConfig "standard"}}
     "eslint-config-standard": "^6.2.1",
     "eslint-plugin-promise": "^3.4.0",
@@ -57,15 +58,15 @@
     "http-proxy-middleware": "^0.17.3",
     "webpack-bundle-analyzer": "^2.2.1",
     {{#unit}}
-    "cross-env": "^4.0.0",
+    "cross-env": "^5.0.1",
     "karma": "^1.4.1",
     "karma-coverage": "^1.1.1",
     "karma-mocha": "^1.3.0",
     "karma-phantomjs-launcher": "^1.0.2",
     "karma-phantomjs-shim": "^1.4.0",
     "karma-sinon-chai": "^1.3.1",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-spec-reporter": "0.0.30",
+    "karma-spec-reporter": "0.0.31",
     "karma-webpack": "^2.0.2",
     "lolex": "^1.5.2",
     "mocha": "^3.2.0",
@@ -84,8 +85,8 @@
     {{/e2e}}
     "semver": "^5.3.0",
     "shelljs": "^0.7.6",
-    "opn": "^4.0.2",
-    "optimize-css-assets-webpack-plugin": "^1.3.0",
+    "opn": "^5.1.0",
+    "optimize-css-assets-webpack-plugin": "^2.0.0",
     "ora": "^1.2.0",
     "rimraf": "^2.6.0",
     "url-loader": "^0.5.8",