Prepare v6.0.0 release (1st PS 0.15.0-compatible release) (#42)

* Update the bower dependencies

* Update the changelog

CHANGELOG.md

@@ -4,6 +4,16 @@ Notable changes to this project are documented in this file. The format is based
 
 ## [Unreleased]
 
+Breaking changes:
+
+New features:
+
+Bugfixes:
+
+Other improvements:
+
+## [v6.0.0](https://github.com/purescript-node/purescript-node-streams/releases/tag/v6.0.0) - 2022-04-27
+
 Breaking changes:
 - Update project and deps to PureScript v0.15.0 (#39 by @nwolverson, @JordanMartinez, @sigma-andex)
 - Update `write` callback to include `Error` arg (#40 by @JordanMartinez)

bower.json

@@ -12,15 +12,15 @@
     "url": "https://github.com/purescript-node/purescript-node-streams.git"
   },
   "devDependencies": {
-    "purescript-assert": "master",
-    "purescript-console": "master",
-    "purescript-partial": "master"
+    "purescript-assert": "^6.0.0",
+    "purescript-console": "^6.0.0",
+    "purescript-partial": "^4.0.0"
   },
   "dependencies": {
-    "purescript-effect": "master",
-    "purescript-either": "master",
-    "purescript-exceptions": "master",
-    "purescript-node-buffer": "master",
-    "purescript-prelude": "master"
+    "purescript-effect": "^4.0.0",
+    "purescript-either": "^6.0.0",
+    "purescript-exceptions": "^6.0.0",
+    "purescript-node-buffer": "^8.0.0",
+    "purescript-prelude": "^6.0.0"
   }
 }