chore(deps): bump monolog/monolog in /tests/apps/php

Bumps [monolog/monolog](https://github.com/Seldaek/monolog) from 1.25.4 to 1.25.5.
- [Release notes](https://github.com/Seldaek/monolog/releases)
- [Changelog](https://github.com/Seldaek/monolog/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Seldaek/monolog/compare/1.25.4...1.25.5)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

tests/apps/php/composer.lock

@@ -8,16 +8,16 @@
     "packages": [
         {
             "name": "monolog/monolog",
-            "version": "1.25.4",
+            "version": "1.25.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Seldaek/monolog.git",
-                "reference": "3022efff205e2448b560c833c6fbbf91c3139168"
+                "reference": "1817faadd1846cd08be9a49e905dc68823bc38c0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/3022efff205e2448b560c833c6fbbf91c3139168",
-                "reference": "3022efff205e2448b560c833c6fbbf91c3139168",
+                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/1817faadd1846cd08be9a49e905dc68823bc38c0",
+                "reference": "1817faadd1846cd08be9a49e905dc68823bc38c0",
                 "shasum": ""
             },
             "require": {
@@ -91,7 +91,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-05-22T07:31:27+00:00"
+            "time": "2020-07-23T08:35:51+00:00"
         },
         {
             "name": "paragonie/random_compat",