php 8.0 support

Author: krowinski

.travis.yml

@@ -58,6 +58,28 @@ matrix:
         - DB=mysql:8.0
         - TEST_AUTH=yes
       php: "7.4"
+    - env:
+        - DB=mariadb:5.5
+      php: "8.0"
+    - env:
+        - DB=mariadb:10.0
+      php: "8.0"
+    - env:
+        - DB=mariadb:10.1
+      php: "8.0"
+    - env:
+        - DB=mysql:5.5
+      php: "8.0"
+    - env:
+        - DB=mysql:5.6
+      php: "8.0"
+    - env:
+        - DB=mysql:5.7
+      php: "8.0"
+    - env:
+        - DB=mysql:8.0
+        - TEST_AUTH=yes
+      php: "8.0"
 
 before_script:
   - ./.travis/initializedb.sh

src/MySQLReplication/JsonBinaryDecoder/JsonBinaryDecoderFormatter.php

@@ -32,7 +32,7 @@ private static function escapeJsonString($value): string
         return str_replace(
             ["\\", '/', '"', "\n", "\r", "\t", "\x08", "\x0c"],
             ["\\\\", "\\/", "\\\"", "\\n", "\\r", "\\t", "\\f", "\\b"],
-            $value
+            (string)$value
         );
     }