[NonGNU ELPA] Buttercup version 1.40

Version 1.40 of package Buttercup has just been released in NonGNU ELPA.
You can now find it in M-x list-packages RET.

Buttercup describes itself as:

  ==================================
  Behavior-Driven Emacs Lisp Testing
  ==================================

More at https://elpa.nongnu.org/nongnu/buttercup.html

## Summary:

  Buttercup is a behavior-driven development framework for testing
  Emacs Lisp code. It is heavily inspired by the Jasmine test
  framework for JavaScript.

  A test suite begins with a call to the Buttercup macro `describe` with
  the first parameter describing the suite and the rest being the body
  of code that implements the suite.

  ;;; lexical binding is required -*- lexical-binding: t; -*-
  (describe "A suite"
    (it "contains a spec with an expectation"
      (expect t :to-be t)))

  The ideas for project were shamelessly taken from Jasmine
  <https://jasmine.github.io>.

  All the good ideas are theirs. All the problems are mine.

## Recent NEWS:

[Not provided 🙁]