update php version; update phpunit version

Author: mmasiukevich

composer.json

@@ -11,7 +11,7 @@
     "php-service-bus/module-phpinnacle-transport": "^v3.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^7",
+    "phpunit/phpunit": "^8",
     "vimeo/psalm": "^v3"
   },
   "config": {

docker/application/Dockerfile

@@ -1,7 +1,7 @@
-FROM php:7.2-cli-alpine
+FROM php:7.3-cli-alpine
 
 RUN set -xe \
-    && apk add libpq postgresql-dev libevent-dev autoconf zlib-dev g++ libtool make \
+    && apk add libpq postgresql-dev libevent-dev autoconf zlib-dev g++ libtool make libzip-dev \
     && docker-php-ext-install \
         bcmath \
         pcntl \