Sync with rbac-cycle-db, test SQL schema, decouple storages

[arogachev]

Q	A
Is bugfix?	✔️/❌
New feature?	✔️/❌
Breaks BC?	✔️/❌
Fixed issues

[what-the-diff[bot]]

PR Summary

• Version Update Noted in CHANGELOG The record of changes (CHANGELOG.md) file has been updated to show that software's version 1.0.1 has now been upgraded to 2.0.0.

• Simplification of Instructions in README The information and instructions file (README.md) has been altered to remove a mention about making changes manually. This may indicate that the process has been simplified or automated.

• Addition of New Check in Test File The database schema manager test (DbSchemaManagerTest.php) file has seen an addition of a new check. This check examines the size of the 'type' column, which could result in improved data quality or prevent potential errors.

[codecov[bot]]

Codecov Report

Patch coverage: 98.37% and project coverage change: +1.61% :tada:

Comparison is base (0951c18) 97.80% compared to head (7cb001c) 99.42%. Report is 2 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #35 +/- ## ============================================ + Coverage 97.80% 99.42% +1.61% - Complexity 78 123 +45 ============================================ Files 9 9 Lines 455 518 +63 ============================================ + Hits 445 515 +70 + Misses 10 3 -7 ``` | [Files Changed](https://app.codecov.io/gh/yiisoft/rbac-db/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft) | Coverage Δ | | |---|---|---| | [src/TransactionalManagerDecorator.php](https://app.codecov.io/gh/yiisoft/rbac-db/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft#diff-c3JjL1RyYW5zYWN0aW9uYWxNYW5hZ2VyRGVjb3JhdG9yLnBocA==) | `95.45% <95.45%> (ø)` | | | [src/AssignmentsStorage.php](https://app.codecov.io/gh/yiisoft/rbac-db/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft#diff-c3JjL0Fzc2lnbm1lbnRzU3RvcmFnZS5waHA=) | `100.00% <100.00%> (ø)` | | | [src/DbSchemaManager.php](https://app.codecov.io/gh/yiisoft/rbac-db/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft#diff-c3JjL0RiU2NoZW1hTWFuYWdlci5waHA=) | `100.00% <100.00%> (ø)` | | | [src/ItemTreeTraversal/CteItemTreeTraversal.php](https://app.codecov.io/gh/yiisoft/rbac-db/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft#diff-c3JjL0l0ZW1UcmVlVHJhdmVyc2FsL0N0ZUl0ZW1UcmVlVHJhdmVyc2FsLnBocA==) | `100.00% <100.00%> (ø)` | | | [src/ItemsStorage.php](https://app.codecov.io/gh/yiisoft/rbac-db/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft#diff-c3JjL0l0ZW1zU3RvcmFnZS5waHA=) | `100.00% <100.00%> (ø)` | | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/yiisoft/rbac-db/pull/35/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft)

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