npm warning `ERESOLVE overriding peer dependency`

When I have a package.json file like this:

{
  "name": "example",
  "version": "1.0.0",
  "description": "example",
  "keywords": [],
  "license": "MIT",
  "main": "index.js",
  "scripts": {},
  "devDependencies": {
    "@openapitools/openapi-generator-cli": "2.3.3"
  }
}

And I run npm i, I get the following output:

npm WARN ERESOLVE overriding peer dependency
npm WARN Found: rxjs@7.1.0
npm WARN node_modules/rxjs
npm WARN   rxjs@"7.1.0" from @openapitools/openapi-generator-cli@2.3.3
npm WARN   node_modules/@openapitools/openapi-generator-cli
npm WARN     dev @openapitools/openapi-generator-cli@"2.3.3" from the root project
npm WARN 
npm WARN Could not resolve dependency:
npm WARN peer rxjs@"^6.0.0" from @nestjs/common@7.6.17
npm WARN node_modules/@nestjs/common
npm WARN   @nestjs/common@"7.6.17" from @openapitools/openapi-generator-cli@2.3.3
npm WARN   node_modules/@openapitools/openapi-generator-cli
npm WARN ERESOLVE overriding peer dependency
npm WARN Found: rxjs@7.1.0
npm WARN node_modules/rxjs
npm WARN   rxjs@"7.1.0" from @openapitools/openapi-generator-cli@2.3.3
npm WARN   node_modules/@openapitools/openapi-generator-cli
npm WARN     dev @openapitools/openapi-generator-cli@"2.3.3" from the root project
npm WARN 
npm WARN Could not resolve dependency:
npm WARN peer rxjs@"^6.0.0" from @nestjs/core@7.6.17
npm WARN node_modules/@nestjs/core
npm WARN   @nestjs/core@"7.6.17" from @openapitools/openapi-generator-cli@2.3.3
npm WARN   node_modules/@openapitools/openapi-generator-cli

added 132 packages, and audited 133 packages in 20s

25 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities

This wasn't the case with earlier versions (I can at least confirm this isn't the case with 2.2.6, but I didn't try any other versions).

I'm using the following:
NodeJS v15.10.0
npm 7.5.3

Start with the supplied package.json and reproduce npm i using @openapitools/openapi-generator-cli 2.3.3, Node.js 15.10.0, and npm 7.5.3; compare the dependency tree with version 2.2.6. Trace the rxjs and NestJS peer-dependency declarations, and consider the issue resolved when installation no longer emits the reported ERESOLVE warnings without introducing vulnerabilities.