Update PureScript requirements.

Author: nsaunders

docs/src/tutorials/getting-started-with-hyper.rst

@@ -12,9 +12,9 @@ in the PureScript documentation.
 
 .. note::
 
-   Hyper 0.6.0 requires PureScript `version 0.10.6
-   <https://github.com/purescript/purescript/releases/tag/v0.10.6>`__, or
-   higher. If you're using PureScript 0.11.x, upgrade to Hyper 0.7.x or higher.
+   Hyper 0.9.0 requires PureScript `version 0.12.2`
+   <https://github.com/purescript/purescript/releases/tag/v0.12.2>`__, or
+   higher.
 
 Start off by generating an empty project by entering the following commands in
 your terminal: