fix PHP8.1 problem where Types::parseAsciiStringFromRegister() fail…

…s to convert extended ASCII (8bit) characters to UTF-8. Introduced `Charset::$defaultCharset` to be able to set default charset used to convert strings.

Use PHP8.1 in CI flow
Add FC3 and FC4 selection to examples/index.php

.github/workflows/php.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest]
-        php-version: ['7.3', '7.4', '8.0']
+        php-version: ['7.4', '8.0', '8.1']
     name: PHP ${{ matrix.php-version }} Test on ${{ matrix.operating-system }}
     steps:
     - uses: actions/checkout@v2
@@ -31,8 +31,8 @@ jobs:
       run: composer test-ci
 
     - name: Upload coverage to Codecov
-      if: matrix.php-version == '7.4' &&  matrix.operating-system == 'ubuntu-latest'
-      uses: codecov/codecov-action@v1
+      if: matrix.php-version == '8.1' &&  matrix.operating-system == 'ubuntu-latest'
+      uses: codecov/codecov-action@v2
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         file: ./report/coverage.xml

.gitignore

@@ -2,3 +2,4 @@
 
 /vendor/
 /report/
+composer.phar

CHANGELOG.md

@@ -4,6 +4,18 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.3.1] - 2021-12-05
+
+### Added
+
+* Use PHP 8.1 in CI flow.
+* `examples/index.php` now supports FC3 and FC4 requests.
+
+### Fixed
+
+* From PHP 8.1 `Types::parseAsciiStringFromRegister()` fails to convert extended ASCII (8bit) characters to UTF-8. Introduced 
+   `Charset::$defaultCharset` to be able to set default charset used to convert strings.
+
 ## [2.3.0] - 2021-05-09
 
 ### Added

composer.json

@@ -7,7 +7,8 @@
   "type": "library",
   "license": "Apache-2.0",
   "require": {
-    "php": "^7.0 || ^8.0"
+    "php": "^7.0 || ^8.0",
+    "ext-mbstring": "*"
   },
   "require-dev": {
     "phpunit/phpunit": "^9.0",