ci: bump to go 1.19 (#330)

* Bump CI to Go 1.19
* Update golang/go edwards25519 test
* Apply formatting to printer stubs output (to get correct comment formatting)
* Bump gofumpt version

tests/thirdparty/make_workflow.go

@@ -102,7 +102,7 @@ func GenerateWorkflow(s *thirdparty.Suite) ([]byte, error) {
 		g.Linef("- name: Install Go")
 		g.Linef("  uses: actions/setup-go@f6164bd8c8acb4a71fb2791a8b6c4024ff038dab # v3.0.0")
 		g.Linef("  with:")
-		g.Linef("    go-version: 1.18.x")
+		g.Linef("    go-version: 1.19.x")
 		g.Linef("    check-latest: true")
 
 		// Checkout avo.

tests/thirdparty/suite.json

@@ -749,10 +749,10 @@
                 "stars": 103424
             },
             "default_branch": "master",
-            "version": "go1.17.3",
+            "version": "go1.19",
             "packages": [
                 {
-                    "module": "src/crypto/ed25519/internal/edwards25519/field/_asm/go.mod",
+                    "module": "src/crypto/internal/edwards25519/field/_asm/go.mod",
                     "setup": [
                         {
                             "name": "Compile Go Toolchain",
@@ -764,7 +764,7 @@
                     ],
                     "generate": [
                         {
-                            "dir": "src/crypto/ed25519/internal/edwards25519/field/_asm",
+                            "dir": "src/crypto/internal/edwards25519/field/_asm",
                             "commands": [
                                 "go generate -v -x"
                             ]