build: Upgrade phan-taint-check-plugin from 1.5.x to 2.0.1

Add `@param-taint $content escapes_htmlnoent` annotation to
TimelessTemplate::getPortlet(). See explanation on
Id8ef73f2efbe8d4d5510917d55dbac4e41b2b3a1.

Change-Id: I2fc96ed7876292dd6bd1e7f4fe799bdb6d8cdfd1

composer.json

@@ -18,6 +18,6 @@
 		]
 	},
 	"extra": {
-		"phan-taint-check-plugin": "1.5.0"
+		"phan-taint-check-plugin": "2.0.1"
 	}
 }

includes/TimelessTemplate.php

@@ -137,6 +137,7 @@ class TimelessTemplate extends BaseTemplate {
 	 * 		],
 	 * 		...
 	 * 	]
+	 * @param-taint $content escapes_htmlnoent
 	 * @param null|string|array|bool $msg
 	 *
 	 * @return string html