nim-bindings: lift restriction of yaml test on Nim v2.x (#431)

bindings/nim/config.nims

@@ -1,3 +1,6 @@
+when fileExists("nimble.paths"):
+  include "nimble.paths"
+
 import strutils
 from os import DirSep
 

bindings/nim/tests/test_all.nim

@@ -1,14 +1,5 @@
 import
   test_abi,
   test_kzg,
-  test_kzg_ex
-
-when (NimMajor, NimMinor) >= (1, 4) and
-     (NimMajor, NimMinor) <= (1, 6):
-  # nim devel causes shallowCopy error
-  # on yaml
-  import
-    test_yaml
-else:
-  {.warning: "test_yaml skipped because Nim version " &
-    $NimMajor & "." & $NimMinor & " currently not supported.".}
+  test_kzg_ex,
+  test_yaml