.travis.yml in smtpapi-0.1.9 vs .travis.yml in smtpapi-0.1.10

@@ -1,28 +1,27 @@
 language: ruby
 rvm:
-  - 2.7
-  - 2.6
-  - 2.5
-  - 2.4
-  - jruby-9.2
+- 2.7
+- 2.6
+- 2.5
+- 2.4
+- jruby-9.2
 before_script:
-  - make install
+- make install
 script:
-  - make test
+- make test
 deploy:
   provider: rubygems
-  api_key: $RUBYGEMS_API_KEY
+  api_key: "$RUBYGEMS_API_KEY"
   gem: smtpapi
   on:
     tags: true
     rvm: '2.4'
     skip_cleanup: true
-
 notifications:
   slack:
     if: branch = main
     on_pull_requests: false
     on_success: never
     on_failure: change
     rooms:
-      - secure: kyDurUDtXcp+6SfpFeszmzRZEpl2IOFqevGelhKVfx7j+M+p1wvPCkv9vnSdpKaZbQ80EKORxS4ZsnKUL9/yOP2uF9mrzB/DCfzFynw/IVfBejM8nkbf/CmosFh0SkkLuwotaPeqMhAtg1J8Avk1HVKJmihaJfkD6kzQ3PSyKlw=
+      secure: F5/iPScUfgbtjvfAOrU7gyptywZ2JvuC3Wil2I0eebmYTzcg5is0uDwViF1Qt1hQ5yQeKEtza8R7j+ug8MkANjWQOL3w5zMXBKL6UCHV1YLyDW47AAaELouz7yoTjZtu7VvbxPYGxk47eNCRlRfAMHl9VJd1SepXlrTQtwtOHVw=