Bump esbuild to support yarn pnp

[bryanjtc]

Esbuild recently added support for yarn pnp. Bumping the version to 0.15.1 should be enough. The current workaround is to use the plugin @yarnpkg/esbuild-plugin-pnp. Esbuild implementation is faster than the plugin.

[bryanjtc]

Thanks for bumping the version.