Update to use Commonmark 2.0 (#12)

* Update to use Commonmark 2.0

* GitHub actions

* Initial rendering

todo: update markdown files for breaking changes in commonmark html rendering

* cleaning house

still need to update the markdown files

* abbreviation attributes test

* attributes and new window not working

* Light is green on abbreviations test

* Update AbbreviationTest.php

* consolidate, refactor, and re-engineer tests

* Improve type safety

* Create php8.yml

* Delete phpunit.xml.bak

* remove Shoop dependency

* typos

Author: joshbruce

.github/workflows/php.yml

@@ -1,5 +1,4 @@
 name: PHP Composer
-
 on:
   push:
     branches:
@@ -14,13 +13,19 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup PHP Action
+      uses: shivammathur/[email protected]
+      with:
+        php-version: '7.4'
 
     - name: Validate composer.json and composer.lock
       run: composer validate
 
-    # - name: Install dependencies
-      # run: composer install --prefer-dist --no-progress --no-suggest
+    - name: Install dependencies
+      run: composer install --prefer-dist --no-progress --no-suggest
 
-    # - name: Run test suite
-      # run: vendor/bin/phpunit
+    - name: Run test suite
+      run: vendor/bin/phpunit

.github/workflows/php8.yml

@@ -0,0 +1,31 @@
+name: PHP Composer
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup PHP Action
+      uses: shivammathur/[email protected]
+      with:
+        php-version: '8.0'
+
+    - name: Validate composer.json and composer.lock
+      run: composer validate
+
+    - name: Install dependencies
+      run: composer install --prefer-dist --no-progress --no-suggest
+
+    - name: Run test suite
+      run: vendor/bin/phpunit

README.md

@@ -28,7 +28,7 @@ Inspired by the link syntax - `[]()` - and the footnote syntax in the extension
 
 The syntax is a square bracket followed by a period or dot: `[.]()`.
 
-Just like the footnote indcates superscript, the abbreviation syntax was found to indicate shortening to more people than previously proposed options. Placing the dot inside the opening square bracket allows the abbreviation to exist next to other glyphs as opposed to forcing empty space. (A conversation in the [CommonMark [.Spec](Specification) board](https://talk.commonmark.org/t/abbreviations-and-acronyms/890) was also referenced, and informative)
+Just like the footnote indicates superscript, the abbreviation syntax was found to indicate shortening to more people than previously proposed options. Placing the dot inside the opening square bracket allows the abbreviation to exist next to other glyphs as opposed to forcing empty space. (A conversation in the [CommonMark [.Spec](Specification) board](https://talk.commonmark.org/t/abbreviations-and-acronyms/890) was also referenced, and informative.)
 
 Given the traditional use of the `abbr` tag commonly combined with the `title` attribute, the link syntax makes sense as the `a` tag combines inner text with `href` and the `img` tag uses two attributes, `src` and `alt` to be valid and accessible.
 

composer.json

@@ -11,11 +11,10 @@
   ],
   "require": {
     "php": "^7.2|^8.0",
-    "league/commonmark": "~1.5"
+    "league/commonmark": "~2.0.1"
   },
   "require-dev": {
-    "phpunit/phpunit": "^9.1",
-    "8fold/php-shoop": "^0.10.17@dev"
+    "phpunit/phpunit": "^9.1"
   },
   "autoload": {
     "psr-4": {