v0.2.3

- console.assert should not throw error (#1335)
- Support more modes in deno.open (#1282, #1336)
- Simplify code fetch logic (#1322)
- readDir entry mode (#1326)
- Use stderr for exceptions (#1303)
- console.log formatting improvements (#1327, #1299)
- Expose TooLarge error code for buffers (#1298)