fix: packages/embark-vyper/.snyk & packages/embark-vyper/package.json to reduce vulnerabilities

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

packages/embark-vyper/.snyk

@@ -0,0 +1,8 @@
+# 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:
+    - embark-async-wrapper > async > lodash:
+        patched: '2019-07-03T23:37:34.901Z'

packages/embark-vyper/package.json

@@ -40,7 +40,9 @@
     "// typecheck": "tsc",
     "watch": "run-p watch:*",
     "watch:build": "npm run build -- --verbose --watch",
-    "// watch:typecheck": "npm run typecheck -- --preserveWatchOutput --watch"
+    "// watch:typecheck": "npm run typecheck -- --preserveWatchOutput --watch",
+    "snyk-protect": "snyk protect",
+    "prepublish": "npm run snyk-protect"
   },
   "eslintConfig": {
     "extends": "../../.eslintrc.json"
@@ -49,7 +51,8 @@
     "@babel/runtime-corejs2": "7.3.1",
     "embark-async-wrapper": "^4.1.0-beta.3",
     "embark-i18n": "^4.1.0-beta.3",
-    "shelljs": "0.5.3"
+    "shelljs": "0.5.3",
+    "snyk": "^1.189.0"
   },
   "devDependencies": {
     "@babel/cli": "7.2.3",
@@ -65,5 +68,6 @@
     "node": ">=8.12.0 <12.0.0",
     "npm": ">=6.4.1",
     "yarn": ">=1.12.3"
-  }
+  },
+  "snyk": true
 }