Log Message:
gopls: update to 0.4.1.

This release contains mostly stability improvements and smaller
bug fixes. A list of all of the issues fixed in this release can
be found in the gopls/v0.4.1 milestone. A notable change is that
type error analyzers (fillreturns, undeclaredname, unusedparams,
nonewvars) are now on by default.

Ok bsiegert@