Updated dependencies (php>=7.3)

Author: prwater

.gitignore

@@ -2,7 +2,9 @@
 /.phpunit.result.cache
 /bin/
 /composer.lock
+/custom.task.properties
+/custom.type.properties
 /doc/
 /test/coverage.xml
 /test/report/
-/vendor/
+/vendor/

.travis.yml

@@ -1,13 +1,12 @@
 language: php
 php:
-  - '7.1'
-  - '7.2'
   - '7.3'
+  - '7.4'
 
 install:
   - composer self-update
   - composer install
 
 script:
   - ./bin/phing unit
-  
+

composer.json

@@ -7,11 +7,11 @@
   ],
   "license": "MIT",
   "require": {
-    "php": ">=7.1.0"
+    "php": ">=7.3"
   },
   "require-dev": {
-    "phing/phing": "^2.0.0",
-    "phpunit/phpunit": "^7.0.0 || ^8.0.0"
+    "phing/phing": "^2.0",
+    "phpunit/phpunit": "^9.0"
   },
   "autoload": {
     "psr-4": {
@@ -24,6 +24,7 @@
     }
   },
   "config": {
-    "bin-dir": "bin/"
+    "bin-dir": "bin/",
+    "sort-packages": true
   }
 }