Fix deployment of branch/commit snapshots

Due to a bug (spmjs/node-scp2#21) in the program we are using to ssh snapshots onto streams.spec.whatwg.org, commit and branch snapshots have not been being properly deployed since late October. Fixed this by pinning scp2@0.1.4

Worse, we weren't getting notified of this failure because I was erroneously using Travis CI's `after_success` hook to build and deploy the spec and spec snapshots; if that fails, Travis does not notify you. Fixed by using the `script` hook instead.

.travis.yml

@@ -8,6 +8,7 @@ env:
     - secure: "Ga/n9txTxjBDFxsyhbthRZyqVTZA1cOmhH5WaQEWoMcG9yU+RvAdEjqdFmUFHE7SArHIKovyzoupQ9FELESeu8/lkbDtin3MZn3Aj6QXHioBSMihGbduHsGK8yJ1WyjDYXC3fN8XdwNQRZrVFq0ocauPkml/w8uauEsiMo3PX8A="
 before_install:
   - cd reference-implementation
-after_success:
+script:
+  - npm test
   - cd ..
   - bash ./deploy.sh

deploy.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 if [ "$DEPLOY_USER" == "" ]; then
     echo "No deploy credentials present; skipping deploy"
@@ -32,7 +33,7 @@ curl https://api.csswg.org/bikeshed/ -F file=@index.bs > out/index.html;
 cp *.svg out
 
 # Install scp2 as a cross-platform scp that supports passwords
-npm install -g scp2
+npm install -g scp2@0.1.4 # 0.2.0 gives "Error: handle is not a Buffer"
 
 for f in out/*; do
     # Deploy to the commit snapshot location