v6.0.1

Notable changes

• bem-core library was updated to 4.2.1 (#2054).

Bug fixes

• bem-xjst 8.x support: js() was replaced with addJs() (#2050).
• popup_target_anchor: Fix calc logic to support new version of jQuery (#2051).
• Remove old inputs in select_mode_radio-check(#2055).

Other changes

• Added CLA (#2034).
• attach: Remove dead templates (#2056).