Moved -d:release to nimble file, renamed wrc20.nims to config.nims

eth_contracts.nimble

@@ -9,7 +9,7 @@ skipDirs      = @["examples"]
 requires "nim >= 0.18.1", "stint"
 
 proc buildExample(name: string) =
-  exec "nim c --out:examples/" & name & ".wasm examples/" & name
+  exec "nim c -d:release --out:examples/" & name & ".wasm examples/" & name
   exec "./postprocess.sh examples/" & name & ".wasm"
 
 task examples, "Build examples":

examples/config.nims

@@ -2,7 +2,6 @@
 --cpu:i386
 --cc:clang
 --gc:none
---d:release
 --nomain
 --opt:speed