Skip all snapshot tests (nodejs#148)

These tests fail on the node-ci builder:
https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20-%20node.js%20integration%20ng/21832/overview

test/parallel/parallel.status

@@ -47,6 +47,14 @@ test-v8-stats: SKIP
 
 # Node is built without embedded snapshot.
 test-snapshot-basic: SKIP
+test-snapshot-api: SKIP
+test-snapshot-cjs-main: SKIP
+test-snapshot-eval: SKIP
+test-snapshot-gzip: SKIP
+test-snapshot-incompatible: SKIP
+test-snapshot-umd: SKIP
+test-snapshot-warning: SKIP
+test-snapshot-typescript: SKIP
 
 # https://github.com/nodejs/node/issues/43676
 test-repl-pretty-stack: SKIP