Install composer viea phive and remove phpunit from composer dev install

Update comoser test files to work with both, but primary is the phive
installed one.

run tests via 4dev/check/phpunit.sh as before

www/composer.json

@@ -14,9 +14,6 @@
             "lib/"
         ]
     },
-    "require-dev": {
-        "phpunit/phpunit": "^9"
-    },
     "repositories": {
         "git.egplusww.jp.Composer": {
             "type": "composer",