chore: upgrade to hexo 4.0.0

_config.yml

@@ -31,7 +31,9 @@ skip_render:
 new_post_name: :title.md # File name of new posts
 default_layout: post
 titlecase: false # Transform title into titlecase
-external_link: true # Open external links in new tab
+external_link: # Open external links in new tab
+  enable: true
+  field: post
 filename_case: 0
 render_drafts: false
 post_asset_folder: false

package.json

@@ -3,22 +3,22 @@
   "version": "0.0.0",
   "private": true,
   "hexo": {
-    "version": "3.9.0"
+    "version": "4.0.0"
   },
   "dependencies": {
     "clean-css": "^4.2.1",
-    "hexo": "^3.9.0",
+    "hexo": "^4.0.0",
     "hexo-all-minifier": "^0.5.3",
-    "hexo-deployer-git": "^1.0.0",
-    "hexo-filter-github-emojis": "^2.0.1",
-    "hexo-generator-archive": "^0.1.4",
-    "hexo-generator-category": "^0.1.3",
-    "hexo-generator-index": "^0.2.0",
-    "hexo-generator-tag": "^0.2.0",
-    "hexo-renderer-ejs": "^0.3.1",
-    "hexo-renderer-marked": "^1.0.1",
-    "hexo-renderer-stylus": "^0.3.1",
-    "hexo-server": "^0.3.3",
+    "hexo-deployer-git": "^2.0.0",
+    "hexo-filter-github-emojis": "^2.1.0",
+    "hexo-generator-archive": "^1.0.0",
+    "hexo-generator-category": "^1.0.0",
+    "hexo-generator-index": "^1.0.0",
+    "hexo-generator-tag": "^1.0.0",
+    "hexo-renderer-ejs": "^1.0.0",
+    "hexo-renderer-marked": "^2.0.0",
+    "hexo-renderer-stylus": "^1.1.0",
+    "hexo-server": "^1.0.0",
     "uglify-es": "^3.3.9"
   }
-}
+}

themes/icarus

@@ -1 +1 @@
-Subproject commit abe1b82d44790795be9e33250684e0596e403d03
+Subproject commit 98d8bcc8a5efabca8643399a3b8a326c20ead45e