fix: update dependencies

package.json

@@ -19,39 +19,39 @@
     ]
   },
   "dependencies": {
-    "boolean": "^2.0.2",
-    "core-js": "^3.3.3",
+    "boolean": "^2.0.3",
+    "core-js": "^3.4.0",
     "es6-error": "^4.1.1",
     "matcher": "^2.0.0",
-    "roarr": "^2.14.2",
+    "roarr": "^2.14.4",
     "semver": "^6.3.0",
     "serialize-error": "^5.0.0"
   },
   "description": "Global HTTP/HTTPS proxy configurable using environment variables.",
   "devDependencies": {
-    "@babel/cli": "^7.6.4",
-    "@babel/core": "^7.6.4",
-    "@babel/node": "^7.6.3",
+    "@babel/cli": "^7.7.0",
+    "@babel/core": "^7.7.2",
+    "@babel/node": "^7.7.0",
     "@babel/plugin-transform-flow-strip-types": "^7.6.3",
-    "@babel/preset-env": "^7.6.3",
-    "@babel/register": "^7.6.2",
+    "@babel/preset-env": "^7.7.1",
+    "@babel/register": "^7.7.0",
     "anyproxy": "^4.1.0",
     "ava": "^2.4.0",
     "axios": "^0.19.0",
     "babel-plugin-istanbul": "^5.2.0",
     "babel-plugin-transform-export-default-name": "^2.0.4",
     "coveralls": "^3.0.7",
-    "eslint": "^6.5.1",
-    "eslint-config-canonical": "^17.7.0",
-    "flow-bin": "^0.110.1",
+    "eslint": "^6.6.0",
+    "eslint-config-canonical": "^17.8.0",
+    "flow-bin": "^0.111.3",
     "flow-copy-source": "^2.0.8",
     "get-port": "^5.0.0",
     "got": "^9.6.0",
     "husky": "^3.0.9",
     "nyc": "^14.1.1",
     "pem": "^1.14.3",
     "request": "^2.88.0",
-    "semantic-release": "^15.13.27",
+    "semantic-release": "^15.13.30",
     "sinon": "^7.5.0"
   },
   "engines": {

src/factories/createGlobalProxyAgent.js

@@ -64,6 +64,7 @@ const createConfiguration = (configurationInput: ProxyAgentConfigurationInputTyp
     socketConnectionTimeout: typeof environment.GLOBAL_AGENT_SOCKET_CONNECTION_TIMEOUT === 'string' ? parseInt(environment.GLOBAL_AGENT_SOCKET_CONNECTION_TIMEOUT, 10) : defaultConfigurationInput.socketConnectionTimeout,
   };
 
+  // $FlowFixMe
   return {
     ...defaultConfiguration,
     ...omitUndefined(configurationInput),