Update .travis.yml

Removed 7.0 from ignoring list because code coverage can be generated for PHP 7.0.

.travis.yml

@@ -25,7 +25,7 @@ script:
 
 after_script:
   - |
-    if [[ "$TRAVIS_PHP_VERSION" != '7.3' && "$TRAVIS_PHP_VERSION" != '7.0' ]]; then
+    if [[ "$TRAVIS_PHP_VERSION" != '7.3' ]]; then
       wget https://scrutinizer-ci.com/ocular.phar
       php ocular.phar code-coverage:upload --format=php-clover coverage.clover
     fi