Bump version from 0.1.5 to 1.0.0 (because this PR is a breaking change)

Author: DilumAluthge

Project.toml

@@ -1,7 +1,7 @@
 name = "SlurmClusterManager"
 uuid = "c82cd089-7bf7-41d7-976b-6b5d413cbe0a"
 authors = ["Joseph Kleinhenz <kleinhenz.joseph@gmail.com>"]
-version = "0.1.5"
+version = "1.0.0"
 
 [deps]
 Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"