chore(travis): correct YAML syntax in after_success step

Separate steps have been treated as a single one.

.travis.yml

@@ -51,13 +51,13 @@ deploy:
 
 
 after_success:
-  ->
-  test $TRAVIS_PULL_REQUEST == "false"
-  && test $TRAVIS_BRANCH == "master"
-  && test $JOB == "build-docs"
-  && bash ./.travis/deploy-docs.sh
-  ->
-  test $TRAVIS_PULL_REQUEST == "false"
-  && test $TRAVIS_BRANCH == "master"
-  && test $JOB == "build-gitstats"
-  && bash ./.travis/deploy-gitstats.sh
+  - >
+    test $TRAVIS_PULL_REQUEST == "false"
+    && test $TRAVIS_BRANCH == "master"
+    && test $JOB == "build-docs"
+    && bash ./.travis/deploy-docs.sh
+  - >
+    test $TRAVIS_PULL_REQUEST == "false"
+    && test $TRAVIS_BRANCH == "master"
+    && test $JOB == "build-gitstats"
+    && bash ./.travis/deploy-gitstats.sh