feat(rendering): gate rendering based on valid version identifiers (#4614)

* create VersionPragmaFilter component

* use VersionPragmaFilter in BaseLayout

* tighten version idenitifier constraints

* handle case where user specifies a valid `swagger` and `openapi` field

* add traceable class names for each message

* add tests

* linter fixes!

* UNRELATED CHANGE: remove travis short-circuit

* add bypass switch to VersionPragmaFilter

src/core/presets/base.js

@@ -66,6 +66,7 @@ import ArrayModel from "core/components/array-model"
 import PrimitiveModel from "core/components/primitive-model"
 import Property from "core/components/property"
 import TryItOutButton from "core/components/try-it-out-button"
+import VersionPragmaFilter from "core/components/version-pragma-filter"
 import VersionStamp from "core/components/version-stamp"
 import DeepLink from "core/components/deep-link"
 import SvgAssets from "core/components/svg-assets"
@@ -125,6 +126,7 @@ export default function() {
       TryItOutButton,
       Markdown,
       BaseLayout,
+      VersionPragmaFilter,
       VersionStamp,
       OperationExt,
       OperationExtRow,