Updated dependencies and required PHP version

Fixes #55
Closes #56

composer.json

@@ -8,7 +8,7 @@
 	"authors"    : [
 		{
 			"name"    : "Andrey Savchenko",
-			"homepage": "http://www.Rarst.net/"
+			"homepage": "https://www.Rarst.net/"
 		}
 	],
 	"support"    : {
@@ -25,11 +25,11 @@
 		}
 	},
 	"require"    : {
-		"php"                : "^7.1.3 || ^8",
+		"php"                : "^7.2.5 || ^8",
 		"composer/installers": "^1.6 || ^2",
 		"symfony/stopwatch"  : "^4.2.1",
-		"mustache/mustache"  : "^2.12",
-		"pimple/pimple"      : "^3.2.3"
+		"mustache/mustache"  : "^2.14.1",
+		"pimple/pimple"      : "^3.5"
 	},
 	"require-dev": {
 		"twbs/bootstrap": "^3.4",
@@ -49,5 +49,10 @@
 				"Tests"
 			]
 		}
+	},
+	"config": {
+		"allow-plugins": {
+			"composer/installers": true
+		}
 	}
 }