Bump version of @apollographql/graphql-playground-react to v1.7.39. (…

…#4932)

This version brings a number of [Updates] from the upstream fork but also
improves the support for `graphql@15` features like interfaces implementing
interfaces, while maintaining support for the Apollo Query Planner pane and
avoiding some upstream dependency bumps to Redux dependencies which resulted
in the inability to "Save" settings on the Settings panel.

[Updates]: apollographql/graphql-playground@b0e8c3a~...5c7a815

CHANGELOG.md

@@ -12,6 +12,7 @@ The version headers in this history reflect the versions of Apollo Server itself
 > The changes noted within this `vNEXT` section have not been released yet.  New PRs and commits which introduce changes should include an entry in this `vNEXT` section as part of their development.  With few exceptions, the format of the entry should follow convention (i.e., prefix with package name, use markdown `backtick formatting` for package names and code, suffix with a link to the change-set à la `[PR #YYY](https://link/pull/YYY)`, etc.).  When a release is being prepared, a new header will be (manually) created below and the appropriate changes within that release will be moved into the new section.
 
 - The `debug` option to `new ApolloServer` (which adds stack traces to errors) now affects errors that come from requests executed with `server.executeOperation` (and its wrapper `apollo-server-testing`), instead of just errors that come from requests executed over HTTP. [Issue #4107](https://github.com/apollographql/apollo-server/issues/4107) [PR #4948](https://github.com/apollographql/apollo-server/pull/4948)
+- Bump version of `@apollographql/graphql-playground-html` to v1.6.27 and `@apollographql/graphql-playground-react` to v1.7.39 to resolve incorrectly rendered CDN URL when Playground `version` was `false`-y.  [PR #4932](https://github.com/apollographql/apollo-server/pull/4932) [PR #4955](https://github.com/apollographql/apollo-server/pull/4955) [Issue #4937](https://github.com/apollographql/apollo-server/issues/4937)
 
 ## v2.21.0
 

packages/apollo-server-core/src/playground.ts

@@ -7,10 +7,17 @@ export {
   RenderPageOptions as PlaygroundRenderPageOptions,
 } from '@apollographql/graphql-playground-html/dist/render-playground-page';
 
-// This specifies the version of `graphql-playground-react` that will be served
-// from `graphql-playground-html`.  It's passed to ``graphql-playground-html`'s
-// renderPlaygroundPage` via the integration packages' playground configuration.
-const playgroundVersion = '1.7.33';
+// This specifies the React version of our fork of GraphQL Playground,
+// `@apollographql/graphql-playground-react`.  It is related to, but not to
+// be confused with, the `@apollographql/graphql-playground-html` package which
+// is a dependency of Apollo Server's various integration `package.json`s files.
+//
+// The HTML (stub) file renders a `<script>` tag that loads the React (guts)
+// from a CDN URL on jsdelivr.com, which allows serving of files from npm packages.
+// 
+// The version is passed to `@apollographql/graphql-playground-html`'s
+// `renderPlaygroundPage` via the integration packages' `playground` config.
+const playgroundVersion = '1.7.39';
 
 // https://stackoverflow.com/a/51365037
 type RecursivePartial<T> = {