Merge branch 'develop'

* develop:
  docs: fix typo in release notes for boostorg#653 (boostorg#714)

Merge branch 'develop'

* develop:
  docs: Update release notes for range of 36a45e3..eb16140 [ci skip]
  docs: Updated readme language badge to C++14 (boostorg#707) [ci skip]

Remove .ci/#upload_docs.sh# garbage

Remove .ci/#upload_docs.sh# garbage

ci: R.I.P. Travis CI - Long live GitHub Actions

Follows:
- boostorg#544

Outstanding tasks:
- boostorg#549
- boostorg#548

(cherry picked from develop commit 434e78f)

ci: R.I.P. Travis CI - Long live GitHub Actions

Follows:
- boostorg#544

Outstanding tasks:
- boostorg#549
- boostorg#548

(cherry picked from develop commit 434e78f)

ci: R.I.P. Travis CI - Long live GitHub Actions

Follows:
- boostorg#544

Outstanding tasks:
- boostorg#549
- boostorg#548

(cherry picked from develop commit 434e78f)

ci: R.I.P. Travis CI - Long live GitHub Actions

Follows:
- boostorg#544

Outstanding tasks:
- boostorg#549
- boostorg#548

(cherry picked from develop commit 434e78f)

ci: R.I.P. Travis CI - Long live GitHub Actions

Follows:
- boostorg#544

Outstanding tasks:
- boostorg#549
- boostorg#548

(cherry picked from develop commit 434e78f)

ci: R.I.P. Travis CI - Long live GitHub Actions

Follows:
- boostorg#544

Outstanding tasks:
- boostorg#549
- boostorg#548

(cherry picked from develop commit 434e78f)