feat: update to Duniter 1.8.6

package.json

@@ -57,20 +57,20 @@
     "brunch": "2.10.9",
     "core-util-is": "1.0.2",
     "css-brunch": "2.0.0",
-    "duniter": "^1.7.21",
+    "duniter": "1.8.6",
     "fb-flo-brunch": "1.7.22",
     "jade-brunch": "2.0.0",
     "javascript-brunch": "2.0.0",
     "json-brunch": "1.5.4",
     "mocha": "2.2.5",
     "process-nextick-args": "1.0.7",
-    "sass-brunch": "2.0.0",
+    "sass-brunch": "^3.0.1",
     "should": "11.1.0",
     "stylus-brunch": "2.0.0",
     "uglify-js-brunch": "2.0.1",
     "util-deprecate": "1.0.2"
   },
   "peerDependencies": {
-    "duniter": "1.7.x"
+    "duniter": "1.8.6"
   }
 }