treewide: with stdenv.lib; in meta -> with lib;

Part of: https://github.com/NixOS/nixpkgs/issues/108938

meta = with stdenv.lib;

is a widely used pattern. We want to slowly remove
the `stdenv.lib` indirection and encourage people
to use `lib` directly. Thus let’s start with the meta
field.

This used a rewriting script to mostly automatically
replace all occurances of this pattern, and add the
`lib` argument to the package header if it doesn’t
exist yet.

The script in its current form is available at
https://cs.tvl.fyi/depot@2f807d7f141068d2d60676a89213eaa5353ca6e0/-/blob/users/Profpatsch/nixpkgs-rewriter/default.nix

pkgs/development/python-modules/imbalanced-learn/0.4.nix

@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, scikitlearn, pandas, nose, pytest }:
+{ lib, stdenv, buildPythonPackage, fetchPypi, scikitlearn, pandas, nose, pytest }:
 
 buildPythonPackage rec {
   pname = "imbalanced-learn";
@@ -21,7 +21,7 @@ buildPythonPackage rec {
                          and not wrong_memory'
   '';
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Library offering a number of re-sampling techniques commonly used in datasets showing strong between-class imbalance";
     homepage = "https://github.com/scikit-learn-contrib/imbalanced-learn";
     license = licenses.mit;

pkgs/development/python-modules/imbalanced-learn/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy27
+{ lib, stdenv, buildPythonPackage, fetchPypi, isPy27
 , pandas
 , pytestCheckHook
 , scikitlearn
@@ -28,7 +28,7 @@ buildPythonPackage rec {
     "test_make_imbalanced_iris"
   ];
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Library offering a number of re-sampling techniques commonly used in datasets showing strong between-class imbalance";
     homepage = "https://github.com/scikit-learn-contrib/imbalanced-learn";
     license = licenses.mit;