Update http-cache-semantics package (#159)

Update `http-cache-semantics` package to latest patch, resolving a security
issue.

Unlike many security updates Apollo repos receive, this is an _actual_ (non-dev)
dependency of this package which means it is actually a user-facing security
issue.

The potential impact of this issue is limited to a DOS attack (via an
inefficient regex).

This security issue would only affect you if either:
* you pass untrusted (i.e. from your users) `cache-control` request headers
* you sending requests to untrusted REST server that might return malicious
  `cache-control` headers

Since `http-cache-semantics` is a careted (^) dependency in this package, the
security issue can (and might already) be resolved via a `package-lock.json`
update within your project (possibly triggered by `npm audit` or another
dependency update which has already updated its version of the package in
question). If `npm ls http-cache-semantics` reveals a tree of dependencies which
only include the `4.1.1` version (and no references to any previous versions)
then you are currently unaffected and this patch should have (for all intents
and purpose) no effect.

More details available here: GHSA-rc47-6667-2j5j

.changeset/five-snails-stare.md

@@ -0,0 +1,29 @@
+---
+'@apollo/datasource-rest': patch
+---
+
+Update `http-cache-semantics` package to latest patch, resolving a security
+issue.
+
+Unlike many security updates Apollo repos receive, this is an _actual_ (non-dev)
+dependency of this package which means it is actually a user-facing security
+issue.
+
+The potential impact of this issue is limited to a DOS attack (via an
+inefficient regex).
+
+This security issue would only affect you if either:
+* you pass untrusted (i.e. from your users) `cache-control` request headers
+* you sending requests to untrusted REST server that might return malicious
+  `cache-control` headers
+
+Since `http-cache-semantics` is a careted (^) dependency in this package, the
+security issue can (and might already) be resolved via a `package-lock.json`
+update within your project (possibly triggered by `npm audit` or another
+dependency update which has already updated its version of the package in
+question). If `npm ls http-cache-semantics` reveals a tree of dependencies which
+only include the `4.1.1` version (and no references to any previous versions)
+then you are currently unaffected and this patch should have (for all intents
+and purpose) no effect.
+
+More details available here: https://github.com/advisories/GHSA-rc47-6667-2j5j

package.json

@@ -52,7 +52,7 @@
     "@apollo/utils.keyvaluecache": "^2.0.0",
     "@apollo/utils.withrequired": "^2.0.0",
     "@types/http-cache-semantics": "^4.0.1",
-    "http-cache-semantics": "^4.1.0",
+    "http-cache-semantics": "^4.1.1",
     "lodash.isplainobject": "^4.0.6",
     "node-fetch": "^2.6.7"
   },