Log Message:
gopls: update to 0.5.1.

Features

Completion speed improvements

https://golang.org/cl/257240 eliminated some duplicate type-checking in \ 
completions (and some other features), halving latency in most cases.
Improvements to symbol rankings

From https://golang.org/cl/254037:

    Downrank symbols if they are:

        Unexported and outside of the workspace. Since one wouldn't jump to \ 
these symbols to e.g. view documentation, they are less relevant.
        Fields and interface methods. Usually one would jump to the type name, \ 
so having fields highly ranked can be noisy.

Warnings for excluded files

You will now see diagnostics if you open a file that is excluded from the \ 
current build, likely by build tags. This should aid in understanding cases when \ 
gopls fails to work on a certain file.
Better error reporting when code lenses fail

A pop-up with an error will appear if a code lens fails to run its command.
Experimental
Multi-module workspace support

The proposal described in golang/go#32394 is partially implemented, but off by \ 
default.
Enable multi-module workspace support by adding the following to your settings:

"gopls": {
    "experimentalWorkspaceModule": true,
}

With this setting, you will be able to open a directory that contains multiple \ 
modules. Most features will work across modules, but some, such as go mod tidy \ 
diagnostics, are not yet implemented.

Give this a try if you're interested in this new feature, but please note that \ 
it is still very experimental.
Fixes
Toggle GC Details on Windows

There was a bug in the new experimental GC details code lens on Windows machines \ 
(golang/go#41614). We added a work-around to fix the issue.

A list of all issues fixed can be found in the gopls/v0.5.1 milestone.
Documentation

The documentation for settings is now automatically generated so it will stay \ 
up-to-date. Documentation was also updated for working with Neovim and for \ 
working on the Go project itself.
Thank you to our contributors!

@heschik @findleyr @dandua98 @pjweinb @ainar-g