Update dependencies

Notes:

Electron version 4.0.0 has an issue regarding printing. See electron/electron#16219

The whole file "package.json" is marked as changed because of a change in .gitattributes (commit 1817420965a1e57bf27603eb9def9ba0ed41d029)

package.json

@@ -1,73 +1,73 @@
-{
-  "name": "mdview",
-  "version": "1.2.0",
-  "description": "Standalone Markdown viewer",
-  "keywords": [
-    "markdown",
-    "md",
-    "viewer",
-    "standalone"
-  ],
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/c3er/mdview.git"
-  },
-  "author": "Christian Dreier",
-  "license": "MIT",
-  "main": "main.js",
-  "scripts": {
-    "postinstall": "install-app-deps",
-    "start": "electron .",
-    "pack": "build --dir",
-    "dist": "build"
-  },
-  "build": {
-    "nsis": {
-      "oneClick": false,
-      "perMachine": false,
-      "allowElevation": true,
-      "allowToChangeInstallationDirectory": true,
-      "license": "LICENSE",
-      "shortcutName": "Markdown Viewer"
-    },
-    "linux": {
-      "target": [
-        "AppImage"
-      ]
-    },
-    "mac": {
-      "target": [
-        "default"
-      ]
-    },
-    "win": {
-      "target": [
-        "nsis",
-        "zip"
-      ],
-      "icon": "icon/md.ico"
-    },
-    "fileAssociations": [
-      {
-        "name": "Markdown file",
-        "ext": ".md",
-        "icon": "icon/md.ico"
-      },
-      {
-        "name": "Markdown file",
-        "ext": ".markdown",
-        "icon": "icon/md.ico"
-      }
-    ]
-  },
-  "dependencies": {
-    "github-markdown-css": "~2.10.0",
-    "highlight.js": "~9.12.0",
-    "markdown-it": "~8.4.1",
-    "markdown-it-headinganchor": "~1.3.0"
-  },
-  "devDependencies": {
-    "electron": "~3.0.0",
-    "electron-builder": "~20.28.4"
-  }
-}
+{
+  "name": "mdview",
+  "version": "1.2.0",
+  "description": "Standalone Markdown viewer",
+  "keywords": [
+    "markdown",
+    "md",
+    "viewer",
+    "standalone"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/c3er/mdview.git"
+  },
+  "author": "Christian Dreier",
+  "license": "MIT",
+  "main": "main.js",
+  "scripts": {
+    "postinstall": "install-app-deps",
+    "start": "electron .",
+    "pack": "build --dir",
+    "dist": "build"
+  },
+  "build": {
+    "nsis": {
+      "oneClick": false,
+      "perMachine": false,
+      "allowElevation": true,
+      "allowToChangeInstallationDirectory": true,
+      "license": "LICENSE",
+      "shortcutName": "Markdown Viewer"
+    },
+    "linux": {
+      "target": [
+        "AppImage"
+      ]
+    },
+    "mac": {
+      "target": [
+        "default"
+      ]
+    },
+    "win": {
+      "target": [
+        "nsis",
+        "zip"
+      ],
+      "icon": "icon/md.ico"
+    },
+    "fileAssociations": [
+      {
+        "name": "Markdown file",
+        "ext": ".md",
+        "icon": "icon/md.ico"
+      },
+      {
+        "name": "Markdown file",
+        "ext": ".markdown",
+        "icon": "icon/md.ico"
+      }
+    ]
+  },
+  "dependencies": {
+    "github-markdown-css": "~2.10.0",
+    "highlight.js": "~9.13.1",
+    "markdown-it": "~8.4.2",
+    "markdown-it-headinganchor": "~1.3.0"
+  },
+  "devDependencies": {
+    "electron": "~3.0.13",
+    "electron-builder": "~20.38.4"
+  }
+}