Add PHP 7.4 support (#464)

* Add PHP 7.4 to build matrix

* DB fix

* YAML parser fix in test data

* Show versions

* Package updates

* Track used ICAOs

* 7.4 METAR parsing fix

* METAR parser fix

* Formatting

* Add meters to response units

* Call instance for unit conversion

* Return value

* Catch exception for unknown quantity

* Comment fix

* Formatting

* METAR parsing fixes on PHP 7.4

* Package updates

* More random airport ID

* More random airport ID

* Properly disable toolbar

* Semver written out to version file

* Use dev as default identifier

config/version.yml

@@ -3,13 +3,15 @@ current:
   major: 7
   minor: 0
   patch: 0
+  prerelease: 'dev'
+  buildmetadata: ''
+  commit: ''
   git_absorb: git-local
   format: '{$major}.{$minor}.{$patch}'
 build:
   mode: number
   length: 6
-  increment_by: 1
-  number: 180212-2f8a69
+  number:
   git_absorb: git-local
 git:
   git-local: 'git rev-parse --verify HEAD'