v3.12.0 (#4282)

* Use `parameterWithMeta` to get parameter data in <ParameterRow>

* Prefer specPath when fetching resolved subtrees in OperationContainer

* Add test for OAS3 callback rendering

* Remove debugger statement

* Pass base resolution URL directly to Swagger-Client subtree resolver

* Remove accidental comment

* Migrate additional options

* Don't default to empty Map when getting subtree

* fix(validateParam): check for ImList type before using count method

* Use `replaceState` to update `urls.primaryName`

This gives us the stateful URL we want, without:
(a) refreshing the page on update
(b) creating a long, useless history for the user
(c) implying that browser history is two-way bound
    to Swagger-UI (it isn't, we don't have a router)

* Add `fn.opsFilter` docs and internal API versioning note

* restrict `x-example` functionality to Swagger 2.0

* polish Authorize + Close buttons

* add tachyons; use it for padding the new Reset button

* v3.12.0

* rebuild dist

src/plugins/topbar/topbar.jsx

@@ -45,7 +45,10 @@ export default class Topbar extends React.Component {
   setSearch = (spec) => {
     let search = parseSearch()
     search["urls.primaryName"] = spec.name
-    window.location.search = serializeSearch(search)
+    const newUrl = `${window.location.protocol}//${window.location.host}${window.location.pathname}`
+    if(window && window.history && window.history.pushState) {
+      window.history.replaceState(null, "", `${newUrl}?${serializeSearch(search)}`)
+    }
   }
 
   setSelectedUrl = (selectedUrl) => {