is-gen-fn is has invalid package.json in Node 16 #131
Description
The package is-gen-fn, which koa-joi-router has a dependency on, has an issue in its package.json resulting in a DeprecationWarning when koa-joi-router is used in node 16.
[DEP0128] DeprecationWarning: Invalid 'main' field in '/usr/src/app/node_modules/is-gen-fn/package.json' of 'yes'. Please either fix that or report it to the module author
As the is-gen-fn package has not been updated in 7 years nor is it public, and is a single line function I recommend that you implement the function in this package to avoid issues in the future.
Function from is-gen-fn
function isGeneratorFunction(obj) {
return obj && obj.constructor && 'GeneratorFunction' == obj.constructor.name;
}