chore: move branch update to after_success

.travis.yml

@@ -8,7 +8,6 @@ stages:
   - check
   - test
   - cov
-  - interop
 
 node_js:
   - '10'
@@ -20,7 +19,9 @@ os:
   - windows
 
 script: npx nyc -s npx aegir test -t node --timeout 10000 --bail
-after_success: npx nyc report --reporter=text-lcov > coverage.lcov && npx codecov
+after_success:
+  - npx nyc report --reporter=text-lcov > coverage.lcov && npx codecov
+  - test $TRAVIS_BRANCH = "master" && npx aegir update-last-successful-build
 
 jobs:
   include:
@@ -62,10 +63,5 @@ jobs:
         - npm link
         - npm run test:interop
 
-    - stage: tag
-      if: branch = master
-      script:
-        - npx aegir update-last-successful-build
-
 notifications:
   email: false