make nimble file consistent with CI setup (#58)

json_serialization.nimble

@@ -7,7 +7,7 @@ description   = "Flexible JSON serialization not relying on run-time type inform
 license       = "Apache License 2.0"
 skipDirs      = @["tests"]
 
-requires "nim >= 1.2.0",
+requires "nim >= 1.6.0",
          "serialization",
          "stew"
 
@@ -16,9 +16,8 @@ let lang = getEnv("NIMLANG", "c") # Which backend (c/cpp/js)
 let flags = getEnv("NIMFLAGS", "") # Extra flags for the compiler
 let verbose = getEnv("V", "") notin ["", "0"]
 
-let styleCheckStyle = if (NimMajor, NimMinor) < (1, 6): "hint" else: "error"
 let cfg =
-  " --styleCheck:usages --styleCheck:" & styleCheckStyle &
+  " --styleCheck:usages --styleCheck:error" &
   (if verbose: "" else: " --verbosity:0 --hints:off") &
   " --skipParentCfg --skipUserCfg --outdir:build --nimcache:build/nimcache -f" &
   " -d:nimOldCaseObjects"

tests/test_serialization.nim

@@ -198,35 +198,6 @@ var invalid = Invalid(distance: Mile(100))
 when false: reject invalid.toJson
 else: discard invalid
 
-when (NimMajor, NimMinor) < (1, 4):  # Copy from `std/strutils`
-  #
-  #
-  #            Nim's Runtime Library
-  #        (c) Copyright 2012 Andreas Rumpf
-  #
-  #    See the file "copying.txt", included in this
-  #    distribution, for details about the copyright.
-  #
-  func nimIdentNormalize*(s: string): string =
-    ## Normalizes the string `s` as a Nim identifier.
-    ##
-    ## That means to convert to lower case and remove any '_' on all characters
-    ## except first one.
-    runnableExamples:
-      doAssert nimIdentNormalize("Foo_bar") == "Foobar"
-    result = newString(s.len)
-    if s.len > 0:
-      result[0] = s[0]
-    var j = 1
-    for i in 1..len(s) - 1:
-      if s[i] in {'A'..'Z'}:
-        result[j] = chr(ord(s[i]) + (ord('a') - ord('A')))
-        inc j
-      elif s[i] != '_':
-        result[j] = s[i]
-        inc j
-    if j != s.len: setLen(result, j)
-
 type EnumTestX = enum
   x0,
   x1,