[FEATURE] Add support for PHP 7.4

Also only run the CI tasks that do not depend on the PHP version
(i.e., everything except for the PHP linting and the unit tests)
on PHP 7.3 only to avoid problems with PHP 7.4.

Also ignore the platform reqs for PHP 7.3 and 7.4 during composer update
for the time being.

Fixes #819

.travis.yml

@@ -3,10 +3,11 @@ sudo: false
 language: php
 
 php:
-- "7.0"
-- "7.1"
+#- "7.0"
+#- "7.1"
 - "7.2"
 - "7.3"
+- "7.4"
 
 cache:
   directories:
@@ -23,13 +24,16 @@ before_install:
 
 install:
 - >
-  export IGNORE_PLATFORM_REQS="$(composer php:version |grep -q '^7.3' && printf -- --ignore-platform-reqs)";
+  export IGNORE_PLATFORM_REQS="$(composer php:version | grep -q '^7\.[34]' && printf -- --ignore-platform-reqs)";
   echo;
   echo "Updating the dependencies";
   composer update $IGNORE_PLATFORM_REQS --with-dependencies $DEPENDENCIES;
   composer show;
 
 script:
+- >
+  export IS_PHP_73="$(composer php:version | grep -q '^7\.3')";
+
 - >
   echo;
   echo "Validating the composer.json";
@@ -46,21 +50,29 @@ script:
   composer ci:tests:unit;
 
 - >
-  echo;
-  echo "Running PHPMD";
-  composer ci:php:md;
+  if $IS_PHP_73; then
+    echo;
+    echo "Running PHPMD";
+    composer ci:php:md;
+  fi;
 
 - >
-  echo;
-  echo "Running Psalm";
-  composer ci:php:psalm;
+  if $IS_PHP_73; then
+    echo;
+    echo "Running Psalm";
+    composer ci:php:psalm;
+  fi;
 
 - >
-  echo;
-  echo "Running PHP_CodeSniffer";
-  composer ci:php:sniff;
+  if $IS_PHP_73; then
+    echo;
+    echo "Running PHP_CodeSniffer";
+    composer ci:php:sniff;
+  fi;
 
 - >
-  echo;
-  echo "Running PHP-CS-Fixer";
-  composer ci:php:fixer;
+  if $IS_PHP_73; then
+    echo;
+    echo "Running PHP-CS-Fixer";
+    composer ci:php:fixer;
+  fi;

CHANGELOG.md

@@ -6,6 +6,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ## x.y.z
 
 ### Added
+- Add support for PHP 7.4
+  ([#821](https://github.com/MyIntervals/emogrifier/pull/821))
 - Disable php-cs-fixer Yoda conditions
   ([#791](https://github.com/MyIntervals/emogrifier/issues/791),
   [#794](https://github.com/MyIntervals/emogrifier/pull/794))

composer.json

@@ -37,7 +37,7 @@
         "source": "https://github.com/MyIntervals/emogrifier"
     },
     "require": {
-        "php": "~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0",
+        "php": "~7.0 || ~7.1 || ~7.2 || ~7.3 || ~7.4",
         "ext-dom": "*",
         "ext-libxml": "*",
         "symfony/css-selector": "^2.8 || ^3.0 || ^4.0 || ^5.0"