Fix nim v1.2

libp2p.nimble

@@ -128,7 +128,7 @@ task pin, "Create a lockfile":
   exec "nim c -r tools/pinner.nim"
 
 import sequtils
-import os, json
+import os
 task install_pinned, "Reads the lockfile":
   let toInstall = readFile(PinFile).splitWhitespace().mapIt((it.split(";", 1)[0], it.split(";", 1)[1]))
   # [('packageName', 'packageFullUri')]
@@ -145,17 +145,13 @@ task install_pinned, "Reads the lockfile":
   for dependency in listDirs(nimblePkgs):
     let
       fileName = dependency.extractFilename
-      jsonContent = parseJson(readFile(dependency & "/nimblemeta.json"))
-      fileContent =
-        if "metaData" in jsonContent: jsonContent["metaData"]
-        else: jsonContent
+      fileContent = readFile(dependency & "/nimblemeta.json")
       packageName = fileName.split('-')[0]
-      version = fileContent.getOrDefault("vcsRevision").getStr("")
 
     if toInstall.anyIt(
         it[0] == packageName and
         (
-          it[1].split('#')[^1] == version or # nimble for nim 2.X
+          it[1].split('#')[^1] in fileContent or # nimble for nim 2.X
           fileName.endsWith(it[1].split('#')[^1]) # nimble for nim 1.X
         )
       ) == false or