Update dev-dependencies

Author: wooorm

package.json

@@ -43,10 +43,10 @@
     "nyc": "^14.0.0",
     "prettier": "^1.0.0",
     "rehype-parse": "^6.0.0",
-    "remark-cli": "^6.0.0",
-    "remark-parse": "^6.0.0",
-    "remark-preset-wooorm": "^5.0.0",
-    "remark-stringify": "^6.0.0",
+    "remark-cli": "^7.0.0",
+    "remark-parse": "^7.0.0",
+    "remark-preset-wooorm": "^6.0.0",
+    "remark-stringify": "^7.0.0",
     "tape": "^4.0.0",
     "unified": "^8.0.0",
     "unist-builder": "^1.0.0",