[Request] toLowerCase condition keywords

[braco]

Foo:bar === foo:bar in most cases I can think of.

Maybe an option {toLowerCase: true} that defaults to true?

[bradvogel]

Yeah, or ignoreCase: true that defaults to true (would require a major version bump)

[mericsson]

Makes sense, good suggestion. I think change:

static parse(str, transformTextToConditions = []

https://github.com/mixmaxhq/search-string/blob/8eed146/src/searchString.js#L30

To:

static parse(str, options = {
  // Default options.
  transformTextToConditions: [],
  ignoreOperatorCase: true  // Ignores case of operator only.
});

... and do the rest of the implementation 🥇

And it would be a major version bump.

What do you think @braco? Want to take a stab at it with a PR?