Update deps

Signed-off-by: Jack Cherng <jfcherng@gmail.com>

Author: jfcherng

.gitignore

@@ -1,9 +1,9 @@
 # some IDE things
+*.cache
 .idea/
 .tags*
 /.web-server-pid
 **/oracle.sqlite
-.php_cs.cache
 
 # composer
 vendor/

composer.json

@@ -30,7 +30,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.14",
         "phan/phan": "^1.0",
-        "phpunit/phpunit": "^7.2"
+        "phpunit/phpunit": "^7.2 || ^8.0"
     },
     "config": {
         "sort-packages": true