Drop support for PHP 7.0 and PHP 7.1 (End of life) (#1068)

* Drop support for PHP < 7.2 in composer.json

* Update .travis.yml

Drop PHP 7.0 abd 7.1
Add PHP 7.4

* Normalize composer.json files

Using composer-normalize

* Normalize composer.json files (1)

Using composer-normalize

* Fix TomTom testReverseError400

- Will return JSON instead of XML ;
- If API error, returns empty address collection ;

* Apply fixes from StyleCI

* Upgrade to PHPUnit 7
+ Upgrade `nyholm/psr7`

* Normalize providers Travis config

.travis.yml

@@ -3,14 +3,12 @@ sudo: false
 
 php: 7.2
 
-
 install:
-  - composer update --prefer-stable --prefer-dist
+    - composer update --prefer-stable --prefer-dist
 
 script:
     - composer test-ci
 
 after_success:
     - wget https://scrutinizer-ci.com/ocular.phar
     - php ocular.phar code-coverage:upload --format=php-clover build/coverage.xml
-

composer.json

@@ -12,32 +12,34 @@
         }
     ],
     "require": {
-        "php": "^7.0",
-        "willdurand/geocoder": "^4.0",
-        "geoip2/geoip2": "~2.0"
-    },
-    "require-dev": {
-        "phpunit/phpunit": "^6.5 || ^7.5",
-        "geocoder-php/provider-integration-tests": "^1.0.1"
+        "php": "^7.2",
+        "geoip2/geoip2": "~2.0",
+        "willdurand/geocoder": "^4.0"
     },
     "provide": {
         "geocoder-php/provider-implementation": "1.0"
     },
+    "require-dev": {
+        "geocoder-php/provider-integration-tests": "^1.0.1",
+        "phpunit/phpunit": "^7.5"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "4.0-dev"
+        }
+    },
     "autoload": {
-        "psr-4": { "Geocoder\\Provider\\GeoIP2\\": "" },
+        "psr-4": {
+            "Geocoder\\Provider\\GeoIP2\\": ""
+        },
         "exclude-from-classmap": [
             "/Tests/"
         ]
     },
+    "minimum-stability": "dev",
+    "prefer-stable": true,
     "scripts": {
         "test": "vendor/bin/phpunit",
         "test-ci": "vendor/bin/phpunit --coverage-text --coverage-clover=build/coverage.xml"
-    },
-    "minimum-stability": "dev",
-    "prefer-stable": true,
-    "extra": {
-        "branch-alias": {
-            "dev-master": "4.0-dev"
-        }
     }
-}
+}