Sergei Predvoditelev

Change `AR` in method and property names to `Ar`

1

See https://github.com/yiisoft/docs/blob/master/010-code-style.md#names For example: `ActiveQueryInterface::getARInstance()` → `ActiveQueryInterface::getArInstance()` or `ActiveQueryInterface::getARInstance()` → `ActiveQueryInterface::getActiveRecordInstance()`

### What steps will reproduce the problem? ### What is the expected result? ### What do you get instead? ### Additional info | Q | A | ---------------- | ---...

- Finalize constants in `MediaTag` - Raise PhpUnit to `^10` - Move tests from `php81` to `common` directory - Remove `psalm-suppress` annotations for PHP 8.0 only

- `Logger::validateLevel()` - `Logger::setTraceLevel()` - `Logger::setExcludedTracePaths()` - `SystemContextProvider::setTraceLevel()` - `SystemContextProvider::setExcludedTracePaths()` - `Target::getCommonContext()` - `Target::setCommonContext()` - `CategoryFilter::DEFAULT`

For example, `normalizeRequirement()` and `$result`.

| Q | A | ------------- | --- | Is bugfix? | ❌ | New feature? | ✔️ | Breaks BC? | ✔️