js fetch, http/1.1, powershell restmethod, bugfixes

✨ New Targets!
#128 Javascript Fetch API

httpsnippet example.json -t javascript -c fetch

#99 HTTP 1.1 raw request string (RFC 7230)

httpsnippet example.json -t http

#133 Powershell RestMethod support

httpsnippet example.json -t powershell -c restmethod

🐛 Bugfixes:
#123 require openssl if url is https

🔒 DevDependencies Security Vulnerabilities patched:
These are devDependencies only and does not affect npm users.
#136, #139

This release was made possible by these first time contributors @StefanDywersant, @irvinlim, and @JPrevost. Thank you!