Raised PHP requirement to 7.1 and updated types.

Fixes #25

src/Provider/Bootable_Provider_Interface.php

@@ -1,9 +1,13 @@
 <?php
+declare( strict_types=1 );
 
 namespace Rarst\Laps\Provider;
 
 use Rarst\Laps\Plugin;
 
+/**
+ * Interface for providers that need to boot up once plugin is ready to start.
+ */
 interface Bootable_Provider_Interface {
 
 	/**
@@ -11,5 +15,5 @@ interface Bootable_Provider_Interface {
 	 *
 	 * @return void
 	 */
-	public function boot( Plugin $laps );
+	public function boot( Plugin $laps ): void;
 }

src/Provider/Hook_Event_Provider.php

@@ -1,4 +1,5 @@
 <?php
+declare( strict_types=1 );
 
 namespace Rarst\Laps\Provider;
 
@@ -18,7 +19,7 @@ class Hook_Event_Provider implements ServiceProviderInterface {
 	/**
 	 * @param Container $pimple Container instance.
 	 */
-	public function register( Container $pimple ) {
+	public function register( Container $pimple ): void {
 
 		$pimple['hook.events'] = function () {
 			return [

src/Provider/Manager_Provider.php

@@ -1,4 +1,5 @@
 <?php
+declare( strict_types=1 );
 
 namespace Rarst\Laps\Provider;
 
@@ -17,7 +18,7 @@ class Manager_Provider implements ServiceProviderInterface, Bootable_Provider_In
 	/**
 	 * @param Container $pimple Container instance.
 	 */
-	public function register( Container $pimple ) {
+	public function register( Container $pimple ): void {
 
 		$pimple['managers'] = function ( Plugin $laps ) {
 			return [
@@ -31,7 +32,7 @@ class Manager_Provider implements ServiceProviderInterface, Bootable_Provider_In
 	/**
 	 * @param Plugin $laps Container instance.
 	 */
-	public function boot( Plugin $laps ) {
+	public function boot( Plugin $laps ): void {
 		$laps['managers'];
 	}
 }

src/Provider/Record_Provider.php

@@ -1,4 +1,5 @@
 <?php
+declare( strict_types=1 );
 
 namespace Rarst\Laps\Provider;
 
@@ -20,7 +21,7 @@ class Record_Provider implements ServiceProviderInterface, Bootable_Provider_Int
 	/**
 	 * @param Container $pimple Container instance.
 	 */
-	public function register( Container $pimple ) {
+	public function register( Container $pimple ): void {
 
 		$pimple['stopwatch'] = $pimple->factory( function () {
 			return new Stopwatch( true );
@@ -51,7 +52,7 @@ class Record_Provider implements ServiceProviderInterface, Bootable_Provider_Int
 	/**
 	 * @param Plugin $laps Container instance.
 	 */
-	public function boot( Plugin $laps ) {
+	public function boot( Plugin $laps ): void {
 		$laps['collectors'];
 	}
 }