Latest apollo (2.32.10) breaks/drops node 15 support

[ggascoigne]

Upgrading apollo from 2.23.5 to 2.32.10 is giving compatibility errors when using node 15. This might be intentional, but if it was mentioned in any of the changelogs I missed it.

$ npm ls @apollo/federation
ui@0.1.0 
└─┬ apollo@2.32.5
  └─┬ apollo-language-server@1.25.2
    └── @apollo/federation@0.20.7

$ grep '"node":' node_modules/apollo/package.json
    "node": ">=8",
$ grep '"node":' node_modules/apollo-language-server/package.json
    "node": ">=8",
$ grep '"node":' node_modules/@apollo/federation/package.json
    "node": ">=8"

$ npm ls @apollo/federation
ui@0.1.0 
└─┬ apollo@2.32.10
  └─┬ apollo-language-server@1.25.7
    └── @apollo/federation@0.23.1

$ grep '"node":' node_modules/apollo/package.json
    "node": ">=8",
$ grep '"node":' node_modules/apollo-language-server/package.json
    "node": ">=8",
$ grep '"node":' node_modules/@apollo/federation/package.json
    "node": ">=12.13.0 <15.0"