Problem with target field -- incorrect tsconfig usage

[swelet]

I'm having the same problem as @yangwao #217 (comment)_ with the target field. I'm trying to write a class with a "get" accessor, and the compiler is giving me

semantic error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.

eventhough target is allready es5.

[ezolenko]

Works for me if I set target to es5 and use this code in a random class:

    private _name : string = '[Animal]';
    get name():string{
        return this._name;
    }

    set name(name:string){
        this._name = name;
    }

[ezolenko]

Could you add verbose output? Part of it is a dump of parsed tsconfig.

[agilgur5]

OP seemed to have this as part of their Rollup config (as a screenshot instead of text unfortunately):

 typescript({
  lib: ["es5", "es6", "es7", "dom"],
  target: "es5",
  declaration: true
})

While it's difficult to tell without a full rollup.config.js or a full tsconfig.json (and OP did not respond to requests for more information), that seems like incorrect usage of rpt2 to me.
rpt2 doesn't support those fields, those are fields of tsconfig.json's compilerOptions. Can see rpt2's list of options in the docs here