fix: package.json, yarn.lock & .snyk to reduce vulnerabilities

The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/SNYK-JS-LODASH-567746

.snyk

@@ -0,0 +1,8 @@
+# Snyk (https://snyk.io) policy file, patches or ignores known vulnerabilities.
+version: v1.16.0
+ignore: {}
+# patches apply the minimum changes required to fix a vulnerability
+patch:
+  SNYK-JS-LODASH-567746:
+    - ngx-childprocess > @types/electron > electron > @electron/get > global-tunnel-ng > lodash:
+        patched: '2020-07-10T04:10:11.863Z'

package.json

@@ -34,7 +34,9 @@
     "prettier:write": "yarn prettier:base -- --write \"src/**/*.{ts,js,html,scss}\"",
     "generate-licenses-file": "yarn license-checker --production --csv --out licenses.csv",
     "prebuildforelectron": "node set-variables-in-env.js --set src/environments/environment.electron.prod.ts",
-    "postbuildforelectron": "node set-variables-in-env.js --unset src/environments/environment.electron.prod.ts"
+    "postbuildforelectron": "node set-variables-in-env.js --unset src/environments/environment.electron.prod.ts",
+    "snyk-protect": "snyk protect",
+    "prepare": "yarn run snyk-protect"
   },
   "private": true,
   "dependencies": {
@@ -85,7 +87,8 @@
     "xterm-addon-attach": "^0.6.0",
     "xterm-addon-fit": "^0.4.0",
     "yargs": "^15.3.1",
-    "zone.js": "~0.10.3"
+    "zone.js": "~0.10.3",
+    "snyk": "^1.361.3"
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "~0.1000.0",
@@ -128,5 +131,6 @@
     "ignore": [
       "typescript"
     ]
-  }
+  },
+  "snyk": true
 }