Update dependency sinon to v6

package-lock.json

@@ -4886,9 +4886,9 @@
       "dev": true
     },
     "nise": {
-      "version": "1.4.1",
+      "version": "1.4.2",
-      "resolved": "https://registry.npmjs.org/nise/-/nise-1.4.1.tgz",
+      "resolved": "https://registry.npmjs.org/nise/-/nise-1.4.2.tgz",
-      "integrity": "sha512-9JX3YwoIt3kS237scmSSOpEv7vCukVzLfwK0I0XhocDSHUANid8ZHnLEULbbSkfeMn98B2y5kphIWzZUylESRQ==",
+      "integrity": "sha512-BxH/DxoQYYdhKgVAfqVy4pzXRZELHOIewzoesxpjYvpU+7YOalQhGNPf7wAx8pLrTNPrHRDlLOkAl8UI0ZpXjw==",
       "dev": true,
       "requires": {
         "@sinonjs/formatio": "^2.0.0",
@@ -6306,9 +6306,9 @@
       "dev": true
     },
     "sinon": {
-      "version": "5.1.1",
+      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-5.1.1.tgz",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-6.0.0.tgz",
-      "integrity": "sha512-h/3uHscbt5pQNxkf7Y/Lb9/OM44YNCicHakcq73ncbrIS8lXg+ZGOZbtuU+/km4YnyiCYfQQEwANaReJz7KDfw==",
+      "integrity": "sha512-MatciKXyM5pXMSoqd593MqTsItJNCkSSl53HJYeKR5wfsDdp2yljjUQJLfVwAWLoBNfx1HThteqygGQ0ZEpXpQ==",
       "dev": true,
       "requires": {
         "@sinonjs/formatio": "^2.0.0",

package.json

@@ -57,7 +57,7 @@
     "serverless-domain-manager": "github:lmorchard/serverless-domain-manager#certificateArn-config",
     "serverless-s3-remover": "0.4.1",
     "serverless-sqs-alarms-plugin": "0.1.7",
-    "sinon": "5.1.1"
+    "sinon": "6.0.0"
   },
   "dependencies": {
     "busboy": "0.2.14",