Resolves issue izniburak#70

.travis.yml

@@ -1,6 +1,10 @@
-language: php 
-php:
-  - "7.0"
-  - "5.6"
-  - "5.5"
-  - "5.4"
+language: php 
+dist: trusty
+php:
+  - "7.4"
+  - "7.3"
+  - "7.2"
+  - "7.1"
+  - "7.0"
+  - "5.6"
+  - "5.5"

composer.json

@@ -17,6 +17,20 @@
     "ext-pdo": "*",
     "ext-json": "*"
   },
+  "suggest": {
+    "ext-pdo_cubrid": "Supports for CUBRID",
+    "ext-pdo_dblib": "Supports for  Microsoft SQL Server and Sybase",
+    "ext-pdo_firebird": "Supports for Firebird",
+    "ext-pdo_ibm": "Supports for IBM",
+    "ext-pdo_informix": "Supports for Informix",
+    "ext-pdo_mysql": "Supports for MySQL",
+    "ext-pdo_sqlsrv": "Supports for Microsoft SQL Server",
+    "ext-pdo_ocl": "Supports for Oracle",
+    "ext-pdo_odbc": "Supports for ODBC and DB2 ",
+    "ext-pdo_pgsql": "Supports for PostgreSQL",
+    "ext-pdo_sqlite": "Supports for SQLite",
+    "ext-pdo_4d": "Supports for 4D"
+  },
   "autoload": {
     "psr-4": {
       "Buki\\": "src"