Implement Google Cloud Storage

[leshchenko1979]

Fixes #3

[sourcery-ai]

Sourcery Code Quality Report

✅  Merging this PR will increase code quality in the affected files by 1.07%.

Quality metrics	Before	After	Change
Complexity	0.98 ⭐	0.93 ⭐	-0.05 👍
Method Length	32.50 ⭐	27.26 ⭐	-5.24 👍
Working memory	4.70 ⭐	4.62 ⭐	-0.08 👍
Quality	87.28% ⭐	88.35% ⭐	1.07% 👍

Other metrics	Before	After	Change
Lines	696	792	96

Changed files	Quality Before	Quality After	Quality Change
perscache/cache.py	76.57% ⭐	76.57% ⭐	0.00%
perscache/storage.py	82.50% ⭐	93.27% ⭐	10.77% 👍
tests/conftest.py	99.33% ⭐	99.33% ⭐	0.00%
tests/test_change.py	91.56% ⭐	91.56% ⭐	0.00%
tests/test_main.py	94.27% ⭐	96.22% ⭐	1.95% 👍
tests/test_storage.py	84.50% ⭐	83.59% ⭐	-0.91% 👎

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
perscache/cache.py	_CachedFunction.__call__	10 🙂	211 ⛔	9 🙂	49.96% 😞	Try splitting into smaller methods
perscache/cache.py	Cache.__call__	5 ⭐	68 🙂	11 😞	66.80% 🙂	Extract out complex expressions
tests/test_storage.py	cache	2 ⭐	56 ⭐	11 😞	71.64% 🙂	Extract out complex expressions
perscache/cache.py	Cache._get_key	1 ⭐	54 ⭐	10 😞	74.85% 🙂	Extract out complex expressions

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