minor #30057 New extensions were released supporting PHP 7.3 (tvlooy)

This PR was merged into the 4.2 branch.

Discussion
----------

New extensions were released supporting PHP 7.3

| Q             | A
| ------------- | ---
| Branch?       | 4.2
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | see travis
| License       | MIT

Requested in #30030

Commits
-------

31de71d216 New extensions were released supporting PHP 7.3

.travis.yml

@@ -13,7 +13,6 @@ addons:
         - slapd
         - zookeeperd
         - libzookeeper-mt-dev
-        - libsasl2-dev
 
 env:
     global:
@@ -50,6 +49,7 @@ before_install:
       sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 6B05F25D762E3157
       sudo add-apt-repository -y ppa:ondrej/php
       sudo apt update
+      sudo apt install -y librabbitmq-dev libsodium-dev
 
     - |
       # Start Redis cluster
@@ -153,8 +153,6 @@ before_install:
           phpenv global $PHP
           INI=~/.phpenv/versions/$PHP/etc/conf.d/travis.ini
           if ! php --ri sodium > /dev/null; then
-              # install libsodium
-              sudo apt-get install libsodium-dev -y
               tfold ext.libsodium tpecl libsodium sodium.so $INI
           fi
 
@@ -163,22 +161,7 @@ before_install:
           tfold ext.igbinary tpecl igbinary-2.0.8 igbinary.so $INI
           tfold ext.zookeeper tpecl zookeeper-0.6.0 zookeeper.so $INI
 
-           if [[ $PHP != 7.3 ]]; then
-              wget http://ftp.debian.org/debian/pool/main/libr/librabbitmq/librabbitmq-dev_0.5.2-2_amd64.deb
-              wget http://ftp.debian.org/debian/pool/main/libr/librabbitmq/librabbitmq1_0.5.2-2_amd64.deb
-              sudo dpkg -i librabbitmq1_0.5.2-2_amd64.deb librabbitmq-dev_0.5.2-2_amd64.deb
-              tfold ext.amqp tpecl amqp-1.9.3 amqp.so $INI
-          else
-              sudo apt install -y librabbitmq-dev
-              git clone https://github.com/pdezwart/php-amqp.git
-              cd php-amqp
-              phpize
-              ./configure
-              make
-              sudo make install
-              cd -
-              echo extension = amqp.so >> $INI
-          fi
+          tfold ext.amqp tpecl amqp-1.9.4 amqp.so $INI
       done
 
     - |