Update dependencies (fixes #789) (#820)

package.json

@@ -64,7 +64,7 @@
     "node": ">=6"
   },
   "devDependencies": {
-    "@types/node": "^8.5.8",
+    "@types/node": "^9.4.6",
     "JSONStream": "^1.3.2",
     "autocannon": "^2.0.0",
     "branch-comparer": "^0.4.0",
@@ -88,7 +88,7 @@
     "send": "^0.16.1",
     "serve-static": "^1.13.1",
     "simple-get": "^2.7.0",
-    "snazzy": "^7.0.0",
+    "snazzy": "^7.1.1",
     "split2": "^2.2.0",
     "standard": "^11.0.0",
     "tap": "^11.1.0",
@@ -99,15 +99,15 @@
   "dependencies": {
     "@types/pino": "^4.7.1",
     "abstract-logging": "^1.0.0",
-    "ajv": "^6.1.1",
+    "ajv": "^6.2.0",
     "avvio": "^5.4.0",
     "end-of-stream": "^1.4.1",
-    "fast-json-stringify": "^1.0.0",
+    "fast-json-stringify": "^1.2.0",
     "find-my-way": "^1.10.1",
     "flatstr": "^1.0.5",
     "light-my-request": "^2.0.1",
     "middie": "^3.1.0",
-    "pino": "^4.10.4",
+    "pino": "^4.13.0",
     "tiny-lru": "^1.5.0"
   },
   "greenkeeper": {