更新依赖到最新，更新electron到7.0.0

package.json

@@ -138,7 +138,7 @@
     "@babel/plugin-syntax-dynamic-import": "^7.2.0",
     "@babel/polyfill": "^7.6.0",
     "@babel/preset-env": "^7.6.3",
-    "autoprefixer": "^9.6.5",
+    "autoprefixer": "^9.7.0",
     "babel-eslint": "^10.0.3",
     "babel-loader": "^8.0.6",
     "babel-minify-webpack-plugin": "^0.3.1",
@@ -147,16 +147,16 @@
     "chalk": "^2.4.2",
     "changelog-parser": "^2.8.0",
     "copy-webpack-plugin": "^5.0.4",
-    "core-js": "^3.3.2",
+    "core-js": "^3.3.4",
     "cos-nodejs-sdk-v5": "^2.5.12",
     "cross-env": "^6.0.3",
     "css-loader": "^3.2.0",
     "del": "^5.1.0",
-    "electron": "^6.0.12",
+    "electron": "^7.0.0",
     "electron-builder": "^21.2.0",
     "electron-debug": "^3.0.1",
     "electron-devtools-installer": "^2.2.4",
-    "eslint": "^6.5.1",
+    "eslint": "^6.6.0",
     "eslint-config-standard": "^14.1.0",
     "eslint-formatter-friendly": "^7.0.0",
     "eslint-loader": "^3.0.2",
@@ -182,14 +182,14 @@
     "rimraf": "^3.0.0",
     "stylus": "^0.54.7",
     "stylus-loader": "^3.0.2",
-    "terser-webpack-plugin": "^2.1.3",
+    "terser-webpack-plugin": "^2.2.1",
     "url-loader": "^2.2.0",
     "vue-loader": "^15.7.1",
     "vue-style-loader": "^4.1.2",
     "vue-template-compiler": "^2.6.10",
     "webpack": "^4.41.2",
     "webpack-cli": "^3.3.9",
-    "webpack-dev-server": "^3.8.2",
+    "webpack-dev-server": "^3.9.0",
     "webpack-hot-middleware": "^2.25.0",
     "webpack-merge": "^4.2.2"
   },