Fix lint errors and warnings

rollup.config.ts

@@ -1,13 +1,17 @@
 import _eslint from '@rollup/plugin-eslint';
 import _typescript from '@rollup/plugin-typescript';
-import { RollupOptions } from 'rollup';
+import { PluginImpl, RollupOptions } from 'rollup';
 import cleanup from 'rollup-plugin-cleanup';
-import dts from 'rollup-plugin-dts';
-import esbuild from 'rollup-plugin-esbuild';
+import _dts, { Options as RollupPluginDtsOptions } from 'rollup-plugin-dts';
+import _esbuild, {
+  Options as RollupPluginEsbuildOptions
+} from 'rollup-plugin-esbuild';
 import outputSize from 'rollup-plugin-output-size';
 import pkg from './package.json' with { type: 'json' };
 
 // NOTE: remove once import errors are fixed for their respective packages
+const dts = _dts as unknown as PluginImpl<RollupPluginDtsOptions>;
+const esbuild = _esbuild as unknown as PluginImpl<RollupPluginEsbuildOptions>;
 const eslint = _eslint as unknown as typeof _eslint.default;
 const typescript = _typescript as unknown as typeof _typescript.default;
 

src/core/spec.types.ts

@@ -3,6 +3,7 @@ import { argstree } from './argstree.js';
 import { Node, NodeData, Options } from './core.types.js';
 
 /** The spec options. */
+// eslint-disable-next-line @typescript-eslint/no-empty-object-type
 export interface SpecOptions extends Omit<Options, 'alias' | 'args'> {}
 
 /** The spec object. */

src/utils/object.utils.ts

@@ -1,4 +1,4 @@
-export function has<T extends Record<keyof any, any>>(
+export function has<T extends Record<keyof unknown, unknown>>(
   obj: T,
   prop: keyof T
 ): boolean {