Merge d418072 into 97a0031

.gitignore

@@ -1,3 +1,5 @@
 build
 coverage
 /vendor
+composer.lock
+*.cache

.travis.yml

@@ -1,10 +1,9 @@
 language: php
 
 php:
-  - 7.1
-  - 7.2
-  - 7.3
-  - 7.4snapshot
+  - 7.4
+  - 8.0
+  - 8.1
 # - nightly
 
 # This triggers builds to run on the new TravisCI infrastructure.
@@ -25,7 +24,7 @@ script:
 
 after_script:
   - |
-    if [[ "$TRAVIS_PHP_VERSION" == '7.2' ]]; then
+    if [[ "$TRAVIS_PHP_VERSION" == '8.0' ]]; then
       wget https://scrutinizer-ci.com/ocular.phar
       php ocular.phar code-coverage:upload --format=php-clover coverage.clover
     fi

composer.json

@@ -22,11 +22,11 @@
         "php": ">=7.0",
         "nesbot/carbon": "^1.26 || ^2.00",
         "ramsey/uuid": "~3.7|~4.0",
-        "symfony/var-dumper": "~3.3|~4.0|~5.0",
-        "voku/portable-ascii": "^1.4"
+        "symfony/var-dumper": "~3.3|~4.0|~5.0|^6.0",
+        "voku/portable-ascii": "^1.4|^2.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "~6.0|~7.0",
+        "phpunit/phpunit": "~6.0|~7.0|~9.0",
         "squizlabs/php_codesniffer": "^2.3",
         "mockery/mockery": "~1.0",
         "moontoast/math": "^1.1"