Revert "Update dependencies accept & boom to new namespace (#3089)"

This reverts commits 0de2942, 97b3f68 and 293e28d.

While the change in #3089 change was seemingly justified and straightforward
(and as #3106 points out, perhaps _too_ straightforward!  😄), it seems
that there was more to the change from `accept` to `@hapi/accept` and `boom`
to `@hapi/boom` than just a name change.  It seems that the packages may
have dropped support for Node.js 6.

While Node.js 6 is no longer supported by the Node Foundation, for
semantic versioning reasons we weren't intending to completely drop support
for it until Apollo Server 3.x.

Maybe there's a more granular update here that maintains this support, but
this update wasn't as simple as it would have seemed to be at face value
(i.e. not a straight package rename of an otherwise internal dependency).

Happy to consider re-landing a similar thing, but we need to make it more
clear in the `CHANGELOG.md` and possibly reserve it for Apollo Server 3.x,
but for now, should revert this to make sure we're not shipping a broken
integration for Hapi users, as reported in #3106.

CHANGELOG.md

@@ -6,7 +6,7 @@ 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.  When a release is being prepared, a new header will be (manually) created below and the the appropriate changes within that release will be moved into the new section.
 
-- _Nothing yet!_
+- `apollo-server-hapi`: Revert switch from `accept` and `boom` which took place in v2.8.0. [PR #3089](https://github.com/apollographql/apollo-server/pull/3089)
 
 ### v2.8.0
 

packages/apollo-server-hapi/package.json

@@ -26,10 +26,10 @@
   },
   "dependencies": {
     "@apollographql/graphql-playground-html": "1.6.24",
-    "@hapi/accept": "^3.2.2",
-    "@hapi/boom": "^7.4.2",
+    "accept": "^3.0.2",
     "apollo-server-core": "file:../apollo-server-core",
     "apollo-server-types": "file:../apollo-server-types",
+    "boom": "^7.1.0",
     "graphql-subscriptions": "^1.0.0",
     "graphql-tools": "^4.0.0"
   },