nimble dump leaking errors from other packages

[jmgomez]

Interestingly, I'm getting the same errors about srv on any nimble command in any package:

$ cd nimble
$ nimble dump
/home/moigagoo/.nimble/pkgs2/srv-0.3.0-cd6349fe6199d52e43f52f796ef900690704e143/srv.nimble(11, 17) Error: assignments to 'version' must be string literals
name: "nimble"
version: "0.99.1"
nimblePath: "/home/moigagoo/projects/nimble/nimble.nimble"
author: "Dominik Picheta"
desc: "Nim package manager."
license: "BSD"
skipDirs: ""
skipFiles: ""
skipExt: ""
installDirs: ""
installFiles: ""
installExt: "nim"
requires: "nim >= 1.6.20"
bin: "nimble"
binDir: ""
srcDir: "src"
backend: "c"
paths: ""
nimDir: "/home/moigagoo/.nimble/pkgs2/nim-2.2.10-17ec440fdb89f8903db29a17898af590087d2b64/bin"
entryPoints: "src/nimble.nim, nimble.nim"
testEntryPoint: ""

Originally posted by @moigagoo in #1715