Release v0.7.5

[DavidMinarsch]

Release summary

Version number: v0.7.5

Release details

• Adds AW3 AEAs
• Adds basic oracle skills and contracts
• Replaces usage of Ropsten testnet with Ganache in packages
• Fixes multiplexer setup when used outside AEA
• Improves help command output of CLI
• Adds integration tests for simple skills
• Adds version check on CLI push
• Adds integration tests for tac negotiation skills
• Multiple docs updates based on user feedback
• Multiple additional tests and test stability fixes

Checklist

Put an x in the boxes that apply.

• I have read the CONTRIBUTING doc
• I am making a pull request against the master branch (left side), from develop
• Lint and unit tests pass locally
• I have checked the fingerprint hashes are correct by running (scripts/generate_ipfs_hashes.py)
• I have regenerated the latest API docs
• I built the documentation and updated it with the latest changes
• I have added an item in HISTORY.md for this release
• I bumped the version number in the aea/__version__.py file.
• I bumped the version number in the docs/version.md file
• I bumped the version number in every Docker image of the repo and published it. Also, I built and published them with tag latest
  (check the READMEs of aea-develop
  and aea-deploy)
• I have checked that the documentation about the aea cli tool works
• I have pushed the latest packages to the registry.

Further comments

[lrahmani]

LGTM