HTTPS support, Promise API, modern ES syntax

* Add support for tunneling a local HTTPS server.
* Return a Promise from localtunnel.

CHANGELOG.md

@@ -0,0 +1,73 @@
+# UNRELEASED
+
+- Add support for tunneling a local HTTPS server
+- Add support for localtunnel server with IP-based tunnel URLs
+- Node.js client API is now Promise-based, with backwards compatibility to callback
+- Major refactor of entire codebase using modern ES syntax (requires Node.js v8.3.0 or above)
+
+# 1.9.2 (2019-06-01)
+
+- Update debug to 4.1.1
+- Update axios to 0.19.0
+
+# 1.9.1 (2018-09-08)
+
+- Update debug to 2.6.9
+
+# 1.9.0 (2018-04-03)
+
+- Add _request_ event to Tunnel emitter
+- Update yargs to support config via environment variables
+- Add basic request logging when --print-requests argument is used
+
+# 1.8.3 (2017-06-11)
+
+- update request dependency
+- update debug dependency
+- update openurl dependency
+
+# 1.8.2 (2016-11-17)
+
+- fix host header transform
+- update request dependency
+
+# 1.8.1 (2016-01-20)
+
+- fix bug w/ HostHeaderTransformer and binary data
+
+# 1.8.0 (2015-11-04)
+
+- pass socket errors up to top level
+
+# 1.7.0 (2015-07-22)
+
+- add short arg options
+
+# 1.6.0 (2015-05-15)
+
+- keep sockets alive after connecting
+- add --open param to CLI
+
+# 1.5.0 (2014-10-25)
+
+- capture all errors on remote socket and restart the tunnel
+
+# 1.4.0 (2014-08-31)
+
+- don't emit errors for ETIMEDOUT
+
+# 1.2.0 / 2014-04-28
+
+- return `client` from `localtunnel` API instantiation
+
+# 1.1.0 / 2014-02-24
+
+- add a host header transform to change the 'Host' header in requests
+
+# 1.0.0 / 2014-02-14
+
+- default to localltunnel.me for host
+- remove exported `connect` method (just export one function that does the same thing)
+- change localtunnel signature to (port, opt, fn)
+
+# 0.2.2 / 2014-01-09