run phar build only on master, rights for token needed

.travis.yml

@@ -3,12 +3,13 @@ dist: bionic
 language: php
 
 php:
+    # 7.2 is covered in minimal dependencies
     - '7.3'
     - '7.4'
 
 before_install:
     # turn off XDebug
-    - phpenv config-rm xdebug.ini || return 0
+    - phpenv config-rm xdebug.ini
 
 install:
     - composer install --no-progress
@@ -18,7 +19,8 @@ script:
 
 stages:
     - test
-    - compile
+    - name: compile
+      if: (branch = master OR tag IS present) && type = push
     - name: phar
       if: (branch = master OR tag IS present) && type = push
     - coverage
@@ -66,6 +68,7 @@ jobs:
                 # install lowest dependencies
                 - composer update --prefer-lowest --no-progress
 
+        -
             # Run standalone install in non-root package, ref https://github.com/rectorphp/rector/issues/732
             stage: test
             php: 7.3
@@ -100,15 +103,16 @@ jobs:
             name: Test Coverage
             script:
                 - phpdbg -qrr -d memory_limit=-1 vendor/bin/phpunit --coverage-clover coverage.xml
+                # Coveralls.io
                 - wget https://github.com/php-coveralls/php-coveralls/releases/download/v2.1.0/php-coveralls.phar
                 - php php-coveralls.phar --verbose
 
     allow_failures:
         - name: Standalone Run
-        - os: windows
 
 cache:
     directories:
+        - $HOME/.composer/cache
         - tmp
 
 notifications: