Upgrade to Laravel 8.x

Author: dmitry-ivanov

.travis.yml

@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 7.2
   - 7.3
   - 7.4
 

README.md

@@ -17,6 +17,7 @@ Laravel-specific and pure PHP Helper Functions.
 
 | Laravel | Helper Functions                                                            |
 | ------- | :-------------------------------------------------------------------------: |
+| 8.x     | [8.x](https://github.com/dmitry-ivanov/laravel-helper-functions/tree/8.x)   |
 | 7.x     | [7.x](https://github.com/dmitry-ivanov/laravel-helper-functions/tree/7.x)   |
 | 6.x     | [6.x](https://github.com/dmitry-ivanov/laravel-helper-functions/tree/6.x)   |
 | 5.8.*   | [5.8.*](https://github.com/dmitry-ivanov/laravel-helper-functions/tree/5.8) |
@@ -85,10 +86,6 @@ Laravel-specific and pure PHP Helper Functions.
 - [Json](#json)
     - [is_json](#is_json)
 
-- [Strings](#strings)
-    - [str_lower](#str_lower)
-    - [str_upper](#str_upper)
-
 - [System](#system)
     - [is_windows_os](#is_windows_os)
 
@@ -435,32 +432,6 @@ is_json('{"foo":1,"bar":2,"baz":3}', true);
 // ["foo" => 1, "bar" => 2, "baz" => 3]
 ```
 
-## Strings
-
-#### `str_lower()`
-
-> Deprecated, use the `Illuminate\Support\Str::lower()` instead.
-
-Convert string to lowercase, assuming it's in the `UTF-8` encoding:
-
-```php
-str_lower('TeSt');
-
-// "test"
-```
-
-#### `str_upper()`
-
-> Deprecated, use the `Illuminate\Support\Str::upper()` instead.
-
-Convert string to uppercase, assuming it's in the `UTF-8` encoding:
-
-```php
-str_upper('TeSt');
-
-// "TEST"
-```
-
 ## System
 
 #### `is_windows_os()`

composer.json

@@ -12,22 +12,22 @@
         "email": "dmitry.g.ivanov@gmail.com"
     }],
     "require": {
-        "php": "^7.2.5",
+        "php": "^7.3",
         "ext-dom": "*",
         "ext-json": "*",
         "ext-simplexml": "*",
-        "illuminate/support": "^7.0",
+        "illuminate/support": "^8.0",
         "nesbot/carbon": "^2.17",
-        "symfony/filesystem": "^5.0",
-        "symfony/finder": "^5.0",
-        "symfony/process": "^5.0",
-        "symfony/var-dumper": "^5.0",
+        "symfony/filesystem": "^5.1",
+        "symfony/finder": "^5.1",
+        "symfony/process": "^5.1",
+        "symfony/var-dumper": "^5.1",
         "spatie/array-to-xml": "^2.7"
     },
     "require-dev": {
         "phpunit/phpunit": "^8.4|^9.0",
         "mockery/mockery": "^1.3.1",
-        "illuminated/testing-tools": "^7.0"
+        "illuminated/testing-tools": "^8.0"
     },
     "autoload": {
         "files": [