Add PSR7 and PSR17 aliases

Author: Nyholm

nyholm/psr7/1.0/manifest.json

@@ -1,4 +1,5 @@
 {
+    "aliases": ["psr7", "psr-7","psr17", "psr-17"],
     "copy-from-recipe": {
         "config/": "%CONFIG_DIR%/"
     }