Patched megaparsec-7.0.3

[jneira]

• New version 7.0.x or/and its use in dhall-1.18.0 throws fewer StackOverflow's but still it throws some
• No support for eta version <= 0.0.9.7, let me know if you think it is still needed
• Not sure if it is needed to replicate the patch for 7.0.0/1/2

[rahulmutt]

Thanks @jneira! The work you've done is enough - no need for the other things you suggested.

Btw what do you mean by fewer StackOverflowErrors? You shouldn't be getting them to begin with! Please file an issue on the eta repo detailing the situation.

[jneira]

@rahulmutt dhall throwed the StackOverflow with this input: { name = "dhall", description = "desc", stars = 123 } before the patch, in a similar way it did with simpler inputs in the past (see typelead/eta#704 (comment))
I thought it is normal with parser that uses continuation style.