decaffeinate: Rename ca.coffee and 11 other files from .coffee to .js

packages/https-proxy/test/spec_helper.js

@@ -0,0 +1,19 @@
+chai          = require("chai")
+sinon         = require("sinon")
+Promise       = require("bluebird")
+sinonChai     = require("sinon-chai")
+sinonPromise  = require("sinon-as-promised")(Promise)
+
+global.request   = require("request-promise")
+global.sinon     = sinon
+global.supertest = require("supertest")
+
+chai.use(sinonChai)
+
+global.expect = chai.expect
+
+beforeEach ->
+  @sandbox = sinon.sandbox.create()
+
+afterEach ->
+  @sandbox.restore()