Switches from gofmt to gofumpt (#848)

This switches to gofumpt and applies changes, as I've noticed working
in dapr (who uses this) that it finds some things that are annoying,
such as inconsistent block formatting in test tables.

Signed-off-by: Adrian Cole <adrian@tetrate.io>

examples/cli/cli_test.go

@@ -32,7 +32,7 @@ func TestRun(t *testing.T) {
 	}
 
 	wasmPath := filepath.Join(t.TempDir(), "cli.wasm")
-	require.NoError(t, os.WriteFile(wasmPath, cliWasm, 0755))
+	require.NoError(t, os.WriteFile(wasmPath, cliWasm, 0o755))
 
 	// We can't invoke go run in our docker based cross-architecture tests. We do want to use
 	// otherwise so running unit tests normally does not require special build steps.