add slack notifications (#185)

.travis.yml

@@ -24,3 +24,12 @@ install:
 script:
 - if [ "$PRIVATE_ACCESS" = 1 ] && [ "$TRAVIS_PULL_REQUEST" = "false" ]; then pytest -m "not requires_gpu and not memory_intense"; fi
 - if [ "$PRIVATE_ACCESS" != 1 ]; then pytest -m "not requires_gpu and not memory_intense and not private_access"; fi
+
+notifications:
+  slack:
+    if: |
+      branch = master AND \
+      type IN (push, api, cron)
+    on_success: change
+    on_failure: always
+    secure: 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