[#378] Update contracts from tezos repository

Description

Problem: New protocol arrived, example contracts in the tezos/tezos repo were updated. We should test our code on them.

Solution: Update contract/tezos_examples. 'morley' is incompatible with some of the new contracts. All incompatible contracts are moved to the contracts/008/tezos_examples. We should move all of the back to contract/tezos_examples in #536 (closed). Since these contracts are incompatible, we ignore them in our tests for now.

Currently based on !762 (merged)

Related issue(s)

Resolves #378 (closed)

✅ Checklist for your Merge Request

Related changes (conditional)

• Tests (see short guidelines)

  • If I added new functionality, I added tests covering it.
  • If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.

• Documentation

  • I checked whether I should update the docs and did so if necessary:
    • Root README and other README.md files
    • Haddock
    • docs/
  • I updated changelog files of all affected packages released to Hackage if my changes are externally visible.

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• My code complies with the style guide.