Bump package patch versions to 2.7.7 to trigger/fix harmonizer release (#2999)

The
[harmonizer](https://github.com/apollographql/federation-rs/tree/main/federation-2/harmonizer)
package depends on this repository, and its release was recently broken
by a CircleCI caching bug that was fixed in
apollographql/federation-rs#476. In order to cut
a new release over there, we need to re-release the npm packages in this
repository with a new patch version (2.7.7).

While I was at it, I ran `npm audit fix` to resolve 4 moderate
vulnerability reports in various transitive dependencies.

Author: benjamn

.changeset/silly-fireants-study.md

@@ -0,0 +1,11 @@
+---
+"@apollo/composition": patch
+"apollo-federation-integration-testsuite": patch
+"@apollo/gateway": patch
+"@apollo/federation-internals": patch
+"@apollo/query-graphs": patch
+"@apollo/query-planner": patch
+"@apollo/subgraph": patch
+---
+
+No logical changes since 2.7.5 or 2.7.6, but we fixed a bug in the release process, so we need to publish a new patch version (2.7.7).