* Add errcheck linter
* Check unchecked error
* Add gosimple linter
* Remove type assertion to same type
* Omit nil check
len() for nil slices is defined as zero
* Revert "Remove type assertion to same type"
This reverts commit af69ca1ac8a4f0243a5ccaf5042dbebad6d2cf1c.
* Revert "Revert "Remove type assertion to same type""
This reverts commit 5fe8931504fa22347d04d3d06558e5f478f5bf50.
Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
Co-authored-by: Radosław Kapka <rkapka@wp.pl>