Add execa to 'dependencies'

[NullVoxPopuli]

otherwise,

> pnpm esyes ./get-github-data.mts

file:///home/nvp/Development/NullVoxPopuli/is-polaris-ready-yet/node_modules/.pnpm/esyes@1.0.2/node_modules/esyes/src/bin.js:5
import { execa } from "execa";
         ^^^^^
SyntaxError: Named export 'execa' not found. The requested module 'execa' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:

import pkg from 'execa';
const { execa } = pkg;

    at ModuleJob._instantiate (node:internal/modules/esm/module_job:124:21)
    at async ModuleJob.run (node:internal/modules/esm/module_job:190:5)

Node.js v18.17.0

which is honestly surprising that it resolved at all in that project

[stackblitz]

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