docs: Update docs related to HTTP/2

Node's http2 module is no longer experimental.

README.md

@@ -65,13 +65,12 @@ app.listen(3000)
 
 HTTP/2 is the future of the web. It is faster than HTTP/1.x and comes with new, speed-boosting
 features such as [server push](https://www.smashingmagazine.com/2017/04/guide-http2-server-push/).
-Currently, Node.js has an `http2` module that is still in the experimental stage. The `http2`
-module has a very different API from the `http`/`https` modules, but it also provides a
+The Node.js `http2` module has a very different API from the `http`/`https` modules, but it also provides a
 [compatibility API](https://nodejs.org/api/http2.html#http2_compatibility_api). Medley currently
 uses the compatibility API (to support both HTTP/1.x and HTTP/2), but Medley's API is designed such
 that when Medley upgrades to the full `http2` API, application code built on Medley should not need
 to change. Medley's goal is to insulate application code from this transition (as much as possible)
-so that you can start writing code now that won't require massive rewrites in the future.
+so that code written now that won't require massive rewrites in the future.
 
 
 ## Ecosystem

docs/HTTP2.md

@@ -1,8 +1,7 @@
 # HTTP/2
 
-Medley offers **experimental support** for HTTP/2 starting from Node 8.8.0,
-which includes HTTP/2 without a flag. Medley supports both encrypted and
-unencrypted HTTP/2, but note that browsers only support encrypted HTTP/2.
+Medley supports both encrypted and unencrypted HTTP/2, but note that browsers
+only support encrypted HTTP/2.
 
 ### Secure (HTTPS)
 
@@ -28,10 +27,8 @@ app.listen(3000);
 ```
 
 ALPN negotiation allows to support both HTTPS and HTTP/2 over the same socket.
-Node core [`req`](Request.md#reqstream) and [`res`](Response.md#resstream)
-objects can be either [HTTP/1](https://nodejs.org/api/http.html) or
-[HTTP/2](https://nodejs.org/api/http2.html). To configure Medley to accept both
-HTTPS and secure HTTP/2 connections, use the `allowHTTP1` option:
+To configure Medley to accept both HTTPS and secure HTTP/2 connections, the
+`allowHTTP1` option can be used:
 
 ```js
 const app = medley({

docs/Medley.md

@@ -57,8 +57,9 @@ method (when the `key` or `cert` options are present) or the
 method (when the `key` and `cert` options are not present -- this is not supported by browsers).
 
 If `true`, the HTTP server will be created to use unencrypted HTTP/2 without
-any options. Note that unencrypted HTTP/2 is not supported by browsers. See
-the [HTTP/2 docs](HTTP2.md) for more information.
+any options. Note that unencrypted HTTP/2 is not supported by browsers.
+
+See the [HTTP/2 docs](HTTP2.md) for more information and examples.
 
 The `https` option is ignored if this option is present.