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

Author: jbelien

.travis.yml

@@ -4,7 +4,7 @@ sudo: false
 php: 7.2
 
 install:
-  - composer update --prefer-stable --prefer-dist
+    - composer update --prefer-stable --prefer-dist
 
 script:
     - composer test-ci

composer.json

@@ -2,7 +2,12 @@
     "name": "willdurand/geocoder",
     "type": "library",
     "description": "Common files for PHP Geocoder",
-    "keywords": ["geocoder", "geocoding", "abstraction", "geoip"],
+    "keywords": [
+        "geocoder",
+        "geocoding",
+        "abstraction",
+        "geoip"
+    ],
     "homepage": "http://geocoder-php.org",
     "license": "MIT",
     "authors": [
@@ -12,29 +17,31 @@
         }
     ],
     "require": {
-        "php": "^7.0"
+        "php": "^7.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.5 || ^7.5",
-        "symfony/stopwatch": "~2.5",
-        "nyholm/nsa": "^1.1"
+        "nyholm/nsa": "^1.1",
+        "phpunit/phpunit": "^7.5",
+        "symfony/stopwatch": "~2.5"
     },
     "suggest": {
         "symfony/stopwatch": "If you want to use the TimedGeocoder"
     },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "4.1-dev"
+        }
+    },
     "autoload": {
-        "psr-4": { "Geocoder\\": "" },
+        "psr-4": {
+            "Geocoder\\": ""
+        },
         "exclude-from-classmap": [
             "/Tests/"
         ]
     },
     "scripts": {
         "test": "vendor/bin/phpunit",
         "test-ci": "vendor/bin/phpunit --coverage-text --coverage-clover=build/coverage.xml"
-    },
-    "extra": {
-        "branch-alias": {
-            "dev-master": "4.1-dev"
-        }
     }
-}
+}