Case-insensitive search with JMESPath

The question is simple. How to do a case-insensitive searching with JMESPath?

Let's say to search for foo in this JSON:

[
  "foo",
  "foobar",
  "barfoo",
  "bar",
  "baz",
  "barbaz",
  "FOO"
]

Here is the case-sensitive search query:

[?contains(@, 'foo')]

It will returns ["foo", "foobar", "barfoo"] but it misses "FOO".