fix: (node4) use older version of debug + use strict to support node 4

Author: brian-mann

package.json

@@ -80,7 +80,7 @@
     "sinon": "7.2.5"
   },
   "dependencies": {
-    "debug": "4.1.1"
+    "debug": "3.1.0"
   },
   "optionalDependencies": {
     "@cypress/registry-js": "1.3.3-patch1"

src/index.js

@@ -1,3 +1,5 @@
+'use strict'
+
 const debug = require('debug')('get-windows-proxy')
 const os = require('os')
 const registry = require('./registry')

src/registry.js

@@ -1,3 +1,5 @@
+'use strict'
+
 const os = require('os')
 const debug = require('debug')('get-windows-proxy')