fix: .snyk & package.json to reduce vulnerabilities

The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/SNYK-JS-LODASH-450202

.snyk

@@ -0,0 +1,14 @@
+# Snyk (https://snyk.io) policy file, patches or ignores known vulnerabilities.
+version: v1.13.5
+ignore: {}
+# patches apply the minimum changes required to fix a vulnerability
+patch:
+  SNYK-JS-LODASH-450202:
+    - tap > nyc > istanbul-lib-instrument > @babel/types > lodash:
+        patched: '2019-07-04T00:02:13.775Z'
+    - tap > nyc > istanbul-lib-instrument > @babel/traverse > @babel/types > lodash:
+        patched: '2019-07-04T00:02:13.775Z'
+    - tap > nyc > istanbul-lib-instrument > @babel/traverse > @babel/helper-split-export-declaration > @babel/types > lodash:
+        patched: '2019-07-04T00:02:13.775Z'
+    - tap > nyc > istanbul-lib-instrument > @babel/traverse > @babel/helper-function-name > @babel/template > @babel/types > lodash:
+        patched: '2019-07-04T00:02:13.775Z'

package.json

@@ -5,7 +5,9 @@
   "main": "index.js",
   "scripts": {
     "test": "tap test.js --coverage --100",
-    "test:coverage": "tap test.js --coverage --100 --coverage-report=html"
+    "test:coverage": "tap test.js --coverage --100 --coverage-report=html",
+    "snyk-protect": "snyk protect",
+    "prepublish": "npm run snyk-protect"
   },
   "bugs": {
     "url": "https://github.com/lolo32/fastify-response-time/issues"
@@ -29,6 +31,8 @@
     "tap": "^12.1.0"
   },
   "dependencies": {
-    "fastify-plugin": "^1.3.0"
-  }
+    "fastify-plugin": "^1.3.0",
+    "snyk": "^1.189.0"
+  },
+  "snyk": true
 }