chore(package): update dependencies

package.json

@@ -36,7 +36,7 @@
   "dependencies": {
     "@marsaud/smb2-promise": "^0.2.1",
     "@nraynaud/struct-fu": "^1.0.1",
-    "ajv": "^5.5.2",
+    "ajv": "^6.1.1",
     "app-conf": "^0.5.0",
     "archiver": "^2.1.0",
     "babel-runtime": "^6.26.0",
@@ -56,7 +56,7 @@
     "escape-string-regexp": "^1.0.5",
     "event-to-promise": "^0.8.0",
     "exec-promise": "^0.7.0",
-    "execa": "^0.8.0",
+    "execa": "^0.9.0",
     "express": "^4.16.2",
     "express-session": "^1.15.6",
     "fatfs": "^0.10.4",
@@ -69,7 +69,7 @@
     "http-proxy": "^1.16.2",
     "http-request-plus": "^0.5.0",
     "http-server-plus": "^0.8.0",
-    "human-format": "^0.9.2",
+    "human-format": "^0.10.0",
     "is-redirect": "^1.0.0",
     "js-yaml": "^3.10.0",
     "json-rpc-peer": "0.14",
@@ -109,7 +109,7 @@
     "tmp": "^0.0.33",
     "uuid": "^3.0.1",
     "value-matcher": "^0.0.0",
-    "ws": "^3.3.3",
+    "ws": "^4.0.0",
     "xen-api": "^0.16.4",
     "xml2js": "^0.4.19",
     "xo-acl-resolver": "^0.2.3",