Fix unit tests (#11)

Author: casperbiering

.github/workflows/ci.yaml

@@ -0,0 +1,29 @@
+name: CI
+
+on:
+  pull_request: null
+
+jobs:
+  run:
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      matrix:
+        operating-system: [ubuntu-latest, windows-latest]
+        php-versions: ['7.3', '7.4', '8.0', '8.1']
+    name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.operating-system }}
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php-versions }}
+        extensions: xmlreader, xmlwriter, gmp, mbstring
+        tools: composer
+
+    - name: Install Dependencies
+      run: composer install --prefer-dist
+
+    - name: Run PHPUnit
+      run: ./vendor/bin/phpunit

.gitignore

@@ -1,6 +1,52 @@
-*~
-/composer.lock
-/*.komodoproject
-/nbproject/
-/phpunit.xml
+# Created by https://www.toptal.com/developers/gitignore/api/composer,phpunit,visualstudiocode
+# Edit at https://www.toptal.com/developers/gitignore?templates=composer,phpunit,visualstudiocode
+
+### Composer ###
+composer.phar
 /vendor/
+
+# Commit your application's lock file https://getcomposer.org/doc/01-basic-usage.md#commit-your-composer-lock-file-to-version-control
+# You may choose to ignore a library lock file http://getcomposer.org/doc/02-libraries.md#lock-file
+# composer.lock
+
+### PHPUnit ###
+# Covers PHPUnit
+# Reference: https://phpunit.de/
+
+# Generated files
+.phpunit.result.cache
+.phpunit.cache
+
+# PHPUnit
+/app/phpunit.xml
+/phpunit.xml
+
+# Build data
+/build/
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+# Support for Project snippet scope
+.vscode/*.code-snippets
+
+# Ignore code-workspaces
+*.code-workspace
+
+# End of https://www.toptal.com/developers/gitignore/api/composer,phpunit,visualstudiocode

.travis.yml

@@ -2,14 +2,14 @@
     "name": "casperbiering/dotnet-binary-xml",
     "description": "Parsing and writing of .NET Binary Format",
     "require": {
-        "php": ">=5.3",
+        "php": ">=7.3",
         "ext-xmlreader": "*",
         "ext-xmlwriter": "*",
         "ext-gmp": "*",
         "ext-mbstring": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.8"
+        "phpunit/phpunit": "^9.5"
     },
     "autoload": {
         "psr-4": {