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* Fix matching of default target for CAPI2 cores
* Fix VHDL 2008 usage for GHDL
* Add support for nextpnr in the icestorm backend
* Allow setting user-agent in url provider
* + improved error handling, bug fixes and refactoring
Contributors:
Euripedes Rocha <rocha.euripedesgmail.com>
Olof Kindgren <olof.kindgrengmail.com>