preparing the release notes for next version

doc/release_notes/0_4_0.md

@@ -0,0 +1,39 @@
+# 0.4.0
+
+* Feature: SSH proxy plugin -> send requests over ssh gateway;
+
+```ruby
+HTTPX.plugin(:"proxy/ssh").
+	  with_proxy(uri: "ssh://localhost:2222",
+                 username: "root",
+                 auth_methods: %w[publickey],
+                 host_key: "ssh-rsa",
+                 keys: %w[test/support/ssh/ssh_host_ed25519_key]).get(URI)
+```
+
+* Feature: Faraday Adapter
+
+* refactoring: cookies plugin API simplification (this is a breaking change!)
+
+
+```ruby
+client = HTTPX.plugin(:cookies)
+redirect_response = client.get(URI) #=> ... 302 ... Set-Cookie: "blablalba" ...
+# this sets the cookies
+# GET .... Cookie: "blablabla" ....
+response = client.get(URI) #=> ... 200 ...
+# also, setting cookies:
+
+client.cookies("a" => "b").get(URI) # ... Cookie: "a=b" ...
+
+#also seamlessly integrates with redirect follows
+client = HTTPX.plugins(:follow_redirects, :cookies)
+response = client.get(URI) #=> ... 200 ...
+
+
+
+* bugfix: leaking dns query when passing IO object as option;
+
+* bugfix: now multiple different resolvers are supported;
+
+* support: JRuby is again supported (as usual, only latest stable is guaranteed)