fix: disable psiphon when building with go1.19 (#871)

Part of https://github.com/ooni/probe/issues/2211.

See also https://github.com/ooni/probe/issues/2222, which
describes the issue we have with psiphon and go1.19.

.github/workflows/go1.19.yml

@@ -0,0 +1,27 @@
+# Interim build script checking for go1.19
+#
+# Psiphon not working with go1.19: TODO(https://github.com/ooni/probe/issues/2222)
+#
+name: go1.19
+on:
+  pull_request:
+  push:
+    branches:
+      - "master"
+      - "release/**"
+
+jobs:
+  build_and_test:
+    runs-on: ubuntu-20.04
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - run: go install golang.org/dl/go1.19@latest
+
+      - run: $(go env GOPATH)/bin/go1.19 download
+
+      - run: $(go env GOPATH)/bin/go1.19 build -v ./...
+
+      - run: $(go env GOPATH)/bin/go1.19 test -short -race -tags shaping ./...
+