Experiment with namespace packages.

[tillahoffmann]

See #288 for details.

[codecov-commenter]

Codecov Report

Merging #290 (cc06221) into master (8ab1024) will increase coverage by 0.92%.
The diff coverage is 100.00%.

❗ Current head cc06221 differs from pull request most recent head 304c4c5. Consider uploading reports for the commit 304c4c5 to get more accurate results

@@ Coverage Diff @@## master #290 +/- ##
==========================================
+ Coverage 86.72% 87.64% +0.92% 
==========================================
Files 30 29 -1 Lines 851 842 -9 Branches 58 57 -1 ==========================================
Hits 738 738 + Misses 83 74 -9 
Partials 30 30 

Impacted Files	Coverage Δ
arangodb/testcontainers/arangodb/__init__.py	100.00% <ø> (ø)
azurite/testcontainers/azurite/__init__.py	83.33% <ø> (ø)
clickhouse/testcontainers/clickhouse/__init__.py	100.00% <ø> (ø)
compose/testcontainers/compose/__init__.py	98.36% <ø> (ø)
core/testcontainers/core/config.py	100.00% <ø> (ø)
core/testcontainers/core/container.py	77.31% <ø> (ø)
core/testcontainers/core/docker_client.py	56.36% <ø> (ø)
core/testcontainers/core/exceptions.py	100.00% <ø> (ø)
core/testcontainers/core/generic.py	85.71% <ø> (ø)
core/testcontainers/core/utils.py	57.14% <ø> (ø)
... and 19 more

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