Add lower parser to Text.Parsing.Parser.String.Basic

[mkohlhaas]

Add lower parser to Text.Parsing.Parser.String.Basic.

See also #151

Would also like to export helper function satisfyCP if it makes sense to you.

I didn't add tests for this change.
I had to change spago.dhall to make a build.

My purs version is: 0.14.5
spago: 0.20.7

[jamesdbrock]

Thanks for the PR!

There is already a satisfyCodePoint parser. https://pursuit.purescript.org/packages/purescript-parsing/8.2.0/docs/Text.Parsing.Parser.String#v:satisfyCodePoint , I don't think we should export satisfyCP, it’s an odd little helper function which satisfies a CodePoint predicate but returns a Char.

Why was it necessary to add unfoldable to spago.dhall?

[mkohlhaas]

No idea. No build possible without it. Basically spago told me so and I followed.

Is there any way to find out the reason for me?

(As you can tell by now I'm a PureScript and Haskell beginner.)

[jamesdbrock]

Oops, it looks like I broke the build in the last version v8.2.0 by not adding unfoldable to spago.dhall. Thanks for noticing!

[jamesdbrock]

purescript/package-sets#1078

[jamesdbrock]

Thanks again for the PR @mkohlhaas !