Remove JOSS workflow and prepare for next release

Author: tupui

.github/workflows/joss_paper.yml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "simdec"
-version = "1.2.0"
+version = "1.3.0"
 description = "Sensitivity analysis using simulation decomposition"
 readme = "README.md"
 requires-python = ">=3.10"