Version v1.5.0 - Syncing internal and external version numbers

Update the snapcraft.yaml file to use the new version number that
is expected from external customers

Our internal version number did not match the expected version number

snap/snapcraft.yaml

@@ -1,8 +1,8 @@
 name: pelion-edge
 base: core
-version: "1.4"
+version: "1.5"
 summary: Pelion Edge
-description: Pelion Edge
+description: Pelion Edge - HW CaaS Dev
 confinement: devmode
 grade: devel
 architectures: