Tox

convert calldataload and calldatasize tests #41

Job	Run time
Lint python sources with ruff	10s
Typecheck python sources with mypy	31s
Lint markdown files with markdownlint	4s
Build html documentation with mkdocs	2m 51s
Spellcheck sources with pyspelling	35s
Fill tests, deployed, ubuntu-latest, 3.11	6m 0s
Run unit tests, ubuntu-latest, 3.10	6m 22s
Fill tests, deployed, macos-latest, 3.12	4m 19s
Run unit tests, macos-latest, 3.11	7m 28s
Run unit tests, ubuntu-latest, 3.12	6m 14s
	34m 34s

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