rev to stable in prep for publishing (#83)

Author: devoncarew

CHANGELOG.md

@@ -1,4 +1,4 @@
-## v1.5.0-dev
+## v1.5.0
 
 * Re-wrote the implementation of the action into Dart.
 * Auto-detect the platform architecture (`x64`, `ia32`, `arm`, `arm64`).

DEVELOPING.md

@@ -18,7 +18,7 @@ re-compile the JavaScript code via `npm run all`. This will:
 
 - compile the Dart source (via dart2js) to `lib/main.js`; copy that file to
   `dist/main.cjs`
-- package and minify the `lib/main.mjs` entrypoint point and referencd node
+- package and minify the `lib/main.mjs` entrypoint point and referenced node
   modules to `dist/index.mjs`
 
 ### Files