AEA-1189 Fixes to Crypto plugin PR #2112

[marcofavorito]

Proposed changes

This PR includes several improvements wrt #2112 .

• Add version specifiers in contract AEA packages (Add version specifiers to crypto plugins in contract dependencies #2288)
• Add dependencies: section in aea-config.yaml files (Add 'dependencies' field in AEA configuration #2289)
• Add relevant crypto dependency in each aea-config.yaml in packages (should match default ledger)
• Update demo docs where necessary to include correct dependencies during manual agent construction
• Open issue to write version bumping script
• Add section in upgrading.md of how to upgrade (AEA-1189 Update upgrading.md (after #2112 and #2289) #2303 )

Fixes

n/a

Types of changes

What types of changes does your code introduce to agents-aea?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

Put an x in the boxes that apply.

• I have read the CONTRIBUTING doc
• I am making a pull request against the develop branch (left side). Also you should start your branch off our develop.
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have checked that code coverage does not decrease.
• I have checked that the documentation about the aea cli tool works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

Further comments

n/a

[codecov-io]

Codecov Report

Merging #2291 (5a96041) into develop (d84735a) will decrease coverage by 0.54%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #2291      +/-   ##
===========================================
- Coverage   100.00%   99.45%   -0.55%     
===========================================
  Files          297      420     +123     
  Lines        23293    30653    +7360     
===========================================
+ Hits         23293    30487    +7194     
- Misses           0      166     +166     

Flag	Coverage Δ
unittests	99.45% <100.00%> (-0.55%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
aea/test_tools/test_cases.py	100.00% <ø> (ø)
aea/cli/utils/context.py	100.00% <100.00%> (ø)
aea/configurations/base.py	100.00% <100.00%> (ø)
aea/skills/__init__.py	100.00% <0.00%> (ø)
...ckages/fetchai/skills/confirmation_aw2/strategy.py	100.00% <0.00%> (ø)
packages/fetchai/skills/tac_participation/game.py	100.00% <0.00%> (ø)
...ackages/fetchai/skills/generic_buyer/behaviours.py	100.00% <0.00%> (ø)
...kages/fetchai/skills/confirmation_aw1/dialogues.py	100.00% <0.00%> (ø)
.../fetchai/skills/simple_service_search/dialogues.py	100.00% <0.00%> (ø)
...ea-crypto-ethereum/aea_crypto_ethereum/ethereum.py	97.79% <0.00%> (ø)
... and 116 more

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[DavidMinarsch]

LGTM