Bump core-rpc version to 0.15.0

Author: RCasatta

client/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "core-rpc"
-version = "0.14.0"
+version = "0.15.0"
 authors = [
     "Steven Roose <[email protected]>",
     "Jean Pierre Dudey <[email protected]>",
@@ -19,7 +19,7 @@ name = "core_rpc"
 path = "src/lib.rs"
 
 [dependencies]
-core-rpc-json = { version = "0.14.0", path = "../json" }
+core-rpc-json = { version = "0.15.0", path = "../json" }
 
 log = "0.4.5"
 jsonrpc = "0.12.0"