Update dev-dependencies

Author: wooorm

package.json

@@ -42,13 +42,13 @@
     "browserify": "^14.1.0",
     "esmangle": "^1.0.1",
     "istanbul": "^0.4.4",
-    "remark": "^7.0.0",
-    "remark-cli": "^3.0.0",
+    "remark": "^8.0.0",
+    "remark-cli": "^4.0.0",
     "remark-comment-config": "^5.0.0",
     "remark-github": "^7.0.0",
     "remark-preset-lint-consistent": "^2.0.0",
-    "remark-preset-lint-recommended": "^2.0.0",
-    "remark-usage": "^5.0.0",
+    "remark-preset-lint-recommended": "^3.0.0",
+    "remark-usage": "^6.0.0",
     "remark-validate-links": "^6.0.0",
     "tape": "^4.6.0",
     "xo": "^0.18.0"