Upgrade PHP to 7.3 and fix some related code errors. Disable self_accessor fixer for PHP-CS-Fixer

Dockerfile

@@ -1,4 +1,8 @@
-FROM php:7.2.7-fpm-alpine3.7
+FROM php:7.3.3-fpm-alpine3.9 AS app
+
+# ENV variables for composer
+ENV COMPOSER_NO_INTERACTION 1
+ENV COMPOSER_ALLOW_SUPERUSER 1
 
 # bash needed to support wait-for-it script
 RUN apk add --update --no-cache \
@@ -7,6 +11,7 @@ RUN apk add --update --no-cache \
     openssh \
     dcron \
     zlib-dev \
+    libzip-dev \
     icu-dev \
     libintl \
     imagemagick-dev \
@@ -18,7 +23,7 @@ RUN apk add --update --no-cache \
     pcntl \
     opcache \
  && apk add --no-cache --virtual ".phpize-deps" $PHPIZE_DEPS \
- && yes | pecl install xdebug-2.6.0 \
+ && yes | pecl install xdebug-2.7.1 \
  && yes | pecl install imagick \
  && docker-php-ext-enable imagick \
  && apk del ".phpize-deps" \
@@ -26,17 +31,13 @@ RUN apk add --update --no-cache \
  && rm -rf /tmp/* \
  && mkdir /etc/cron.d
 
-COPY --from=composer:1.6.5 /usr/bin/composer /usr/bin/composer
-COPY --from=node:9.11.2-alpine /usr/local/bin/node /usr/bin/
-COPY --from=node:9.11.2-alpine /usr/lib/libgcc* /usr/lib/libstdc* /usr/lib/* /usr/lib/
-
-# ENV variables for composer
-ENV COMPOSER_NO_INTERACTION 1
-ENV COMPOSER_ALLOW_SUPERUSER 1
+COPY --from=composer:1.8.4 /usr/bin/composer /usr/bin/composer
+COPY --from=node:11.13.0-alpine /usr/local/bin/node /usr/bin/
+COPY --from=node:11.13.0-alpine /usr/lib/libgcc* /usr/lib/libstdc* /usr/lib/* /usr/lib/
 
 RUN mkdir /root/.composer \
  && echo '{"github-oauth": {"github.com": "***REMOVED***"}}' > ~/.composer/auth.json \
- && composer global require --no-progress "hirak/prestissimo:^0.3.7" \
+ && composer global require --no-progress "hirak/prestissimo:^0.3.8" \
  && composer clear-cache
 
 COPY ./docker/php/wait-for-it.sh /usr/local/bin/wait-for-it