Improving Makefile and PHPUNIT dependency on composer.json

Makefile

@@ -1,8 +1,10 @@
 install:
-	composer update
+	command -v composer && composer install || echo "Please, install Composer to use tests"
+	command -v phpunit || command -v composer && composer require --dev phpunit/phpunit ^8
 	chmod +x ./pre-push.sh
 	mkdir -p .git/hooks
 	ln -fs ../../pre-push.sh .git/hooks/pre-push
 
 uninstall:
 	rm -f ./.git/hooks/pre-push
+	if [ -d "./vendor/phpunit" ] ; then composer remove --dev phpunit/phpunit; fi

composer.json

@@ -22,6 +22,5 @@
 		}
    ],
    "require-dev": {
-        "phpunit/phpunit": "^8.2"
-   }
+    }
 }

pre-push.sh

@@ -1 +1,11 @@
-./vendor/phpunit/phpunit/phpunit --bootstrap vendor/autoload.php tests --testdox --color
+params="--bootstrap vendor/autoload.php tests --testdox --color"
+
+if [ $(command -v phpunit) ]; then
+    phpunit $params
+else
+    if [ -d ./vendor/phpunit ]; then
+        ./vendor/phpunit/phpunit/phpunit $params
+    else
+        echo "Please, run 'make install' or install phpunit globally to run the tests"
+    fi
+fi