Fix errors and tests

Author: PasanBhanu

.gitignore

@@ -0,0 +1,2 @@
+/vendor
+.phpunit.result.cache

.travis.yml

@@ -2,13 +2,21 @@ language: php
 
 php:
   - 7.2
+  - 7.3
+  - 7.4
+  - 8.0
 
 env:
+  - LARAVEL_VERSION=^6.0
+  - LARAVEL_VERSION=^7.0
+  - LARAVEL_VERSION=^8.0
+  - LARAVEL_VERSION=^9.0
   matrix:
     fast_finish: true
 
 before_script:
   - travis_retry composer self-update
+  - composer require laravel/framework:${LARAVEL_VERSION}
   - travis_retry composer install --no-interaction --prefer-source
 
 script:

composer.json

@@ -11,11 +11,13 @@
     "type": "library",
     "homepage": "https://www.softinklab.com",
     "require": {
-        "php": "^7.3|^8.0"
+        "php": ">=7.2"
     },
     "require-dev": {
-        "orchestra/database": "^6.0",
-        "orchestra/testbench": "^6.0"
+        "illuminate/support": "^6.0|^7.0|^8.0|^9.0",
+        "illuminate/database": "^6.0|^7.0|^8.0|^9.0",
+        "orchestra/database": "^4.0|^5.0|^6.0",
+        "orchestra/testbench": "^4.0|^5.0|^6.0"
     },
     "autoload": {
         "files": [
@@ -25,6 +27,17 @@
             "SoftinkLab\\LaravelKeyvalueStorage\\" : "src/"
         }
     },
+    "autoload-dev": {
+        "psr-4": {
+            "SoftinkLab\\LaravelKeyvalueStorage\\Test\\": "tests"
+        }
+    },
+    "scripts": {
+        "test": "vendor/bin/phpunit"
+    },
+    "config": {
+        "sort-packages": true
+    },
     "license": "MIT",
     "authors": [
         {