chore: release 0.14.0

[github-actions]

🤖 I have created a release *beep* *boop*

0.14.0 (2022-03-06)

Features

• Build learn-ocaml-www.zip (learn-ocaml --contents-dir=www) (#469) (e36d874)
• Offer better protections against solution overwriting (#372) (5c12539), closes #316 #467
• Rename Try_OCaml→Tutorials, --enable-tryocaml→--enable-tutorials (#451) (9651160)

Bug Fixes

• Change learn-ocaml-www.zip inner dir (www → learn-ocaml-www) (#474) (a602ba2)
• docker: Add missing libs for partition-view/… using compiler-libs (#459) (c2399b0), closes #438
• grader: Workaround issue #457 about the Introspection module (#461) (f5d66c6)
• UI: Restore UX of the welcome message "Choose an activity." (#455) (9d5c7de)

Documentation

• Add CONTRIBUTING.md file (#452) (6e3fa0f)
• Improve ISSUE_TEMPLATEs & Add PULL_REQUEST_TEMPLATE (#453) (d511d58)
• Improve {ISSUE,PULL_REQUEST}_TEMPLATEs, slightly (#464) (e3ff435)

Code Refactoring

• Remove unneeded hooks/ directory (#465) (79ce07e)

Build System

• docker: Refine the .dockerignore as a whitelist (#471) (41706ea)

Tests

• Improve make detect-libs & Use it (Dockerfile.test-server) (7c81d7f)

Dependencies

• opam: Add missing package (ocaml-migrate-parsetree v1.8.0) (38809a5)
• opam: Bump ssl version (9d6da39)

---

This PR was generated with Release Please (then manually edited). See documentation.

[yurug]

Note to the maintainer that will merge this Release PR at some point:

Before merging the PR, push a commit in branch release-v0.14.0 that extends the CHANGELOG.md with this line:

### Documentation

* …
* Improve `ISSUE_TEMPLATE`s & Add `PULL_REQUEST_TEMPLATE` ([#453](https://github.com/ocaml-sf/learn-ocaml/pull/453)) ([d511d58](https://github.com/ocaml-sf/learn-ocaml/commit/d511d58a53778cede681b71f9a9f45922202b371))
* …

↓

Documentation

• …
• Improve ISSUE_TEMPLATEs & Add PULL_REQUEST_TEMPLATE (#453) (d511d58)
• …

I see that this has been done.

[github-actions]

🤖 Release is at https://github.com/ocaml-sf/learn-ocaml/releases/tag/v0.14.0 🌻