Log Message:
gopls: update to 0.7.0.

Features

Postfix completions

Postfix completions are a new style of completions that can save
you time by inserting more complex pieces of commonly-written code.
All of the results end with !. This feature was added experimentally
in gopls/v0.6.10 and is now enabled by default.

New commands: List known packages and add import

These commands can be used to manually list available packages to
import and then add an import to your file. They are currently not
used by any known clients, but they will be made available through
the Command Palette in VS Code in the next VS Code Go release.

Improvements

Memory usage

Improved trimming of the ASTs of dependency packages results in
reduced memory usage, especially for projects with many dependencies.
This may result in some hard-to-diagnose bugs that we're not yet
aware of, so please report any surprising behavior via
https://golang.org/issues/new.