Rewrite to newer symfony versions (#12)

A lot of things were made during rewrite:

*    migrate to src, tests folder
*    drop php <7.2 support (mainly due to symfony and phpunit version restrictions)
*    enable support of symfony 4.x and symfony 5.x (had to add forward-compatibility layer in tests and change container injection to service injection)
*    codestyle added
*    add test coverage for maps generation (requires api key, otherwise skips)

.gitignore

@@ -2,3 +2,5 @@ Tests/testkernel/cache/*
 phpunit.xml
 vendor
 composer.lock
+*.cache
+var/cache

.php_cs.dist

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+$finder = PhpCsFixer\Finder::create()
+    ->in('src')
+    ->in('tests')
+    ->exclude('tests/testkernel/cache');
+
+return PhpCsFixer\Config::create()
+    ->setRules([
+        '@Symfony' => true,
+        'no_unused_imports' => true,
+        'ordered_imports' => true,
+        'phpdoc_summary' => false,
+        'phpdoc_to_comment' => false,
+        'concat_space' => ['spacing' => 'one'],
+        'array_syntax' => ['syntax' => 'short'],
+        'yoda_style' => null,
+        'phpdoc_types_order' => false,
+    ])
+    ->setFinder($finder);

.travis.yml

@@ -7,17 +7,18 @@ cache:
         - $HOME/.composer
 
 php:
-    - hhvm
-    - 5.6
-    - 7.0
-    - 7.1
+    - 7.2
+    - 7.3
+    - 7.4
 env:
-    - deps=high
-    - deps=low
+    - deps=^3.4
+    - deps=^4.4
+    - deps=^5.0
 
 install:
-    - if [ "$deps" = "high" ]; then composer --prefer-dist -n --no-progress update; fi;
-    - if [ "$deps" = "low" ]; then composer --prefer-dist -n --no-progress --prefer-lowest update; fi;
+    - sed -i.bak "s/\^3.4 || ^4.4 || ^5.0/${deps}/" composer.json
+    - composer --prefer-dist -n --no-progress update
 
 script:
+    - vendor/bin/php-cs-fixer fix  --config=.php_cs.dist --dry-run
     - composer test

README.md

@@ -165,6 +165,9 @@ google:
             key: YOUR-API-KEY-FROM-GOOGLE
             host: YOUR-HOST // Host where the gmap image is served.
             (Optional, only needed if script is running from CLI. If not set $_SERVER is used)
+            uploadDir: '%kernel.project_dir%/web/maps' // absolute path to directory where map files
+            publicDir: '/maps' //http path where map files supposed to be publicly available
+           
 ```
 
 Get your key at https://code.google.com/apis/console/