silverwind 74f0c84fa4
Enable more `revive` linter rules ()
Noteable additions:

- `redefines-builtin-id` forbid variable names that shadow go builtins
- `empty-lines` remove unnecessary empty lines that `gofumpt` does not
remove for some reason
- `superfluous-else` eliminate more superfluous `else` branches

Rules are also sorted alphabetically and I cleaned up various parts of
`.golangci.yml`.
..
v82.go Update go dev dependencies ()
v83.go Rename `Sync2` -> `Sync` ()
v84.go Rename `Sync2` -> `Sync` ()
v85.go Enable more `revive` linter rules ()
v86.go Rename `Sync2` -> `Sync` ()
v87.go Rename `Sync2` -> `Sync` ()