Bump lightgbm from 2.3.1 to 3.0.0 (#305)

* Bump lightgbm from 2.3.1 to 3.0.0

Bumps [lightgbm](https://github.com/microsoft/LightGBM) from 2.3.1 to 3.0.0.
- [Release notes](https://github.com/microsoft/LightGBM/releases)
- [Commits](microsoft/LightGBM@v2.3.1...v3.0.0)

Signed-off-by: dependabot[bot] <support@github.com>

* updated random forest test

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: StrikerRUS <nekit94-12@hotmail.com>

requirements-test.txt

@@ -1,7 +1,7 @@
 # Supported models
 scikit-learn==0.23.2
 xgboost==1.2.0
-lightgbm==2.3.1
+lightgbm==3.0.0
 statsmodels==0.12.0
 git+git://github.com/scikit-learn-contrib/lightning.git@782c18c12961e509099ae84c68dd361010642f7e
 

tests/assemblers/test_lightgbm.py

@@ -117,15 +117,15 @@ def test_regression_random_forest():
                     ast.FeatureRef(12),
                     ast.NumVal(5.200000000000001),
                     ast.CompOpType.GT),
-                ast.NumVal(20.206688945020474),
+                ast.NumVal(20.195681040256623),
                 ast.NumVal(38.30000037757679)),
             ast.IfExpr(
                 ast.CompExpr(
                     ast.FeatureRef(5),
-                    ast.NumVal(6.837500000000001),
+                    ast.NumVal(6.853000000000001),
                     ast.CompOpType.GT),
-                ast.NumVal(36.40634951405711),
-                ast.NumVal(19.57067132709245)),
+                ast.NumVal(36.14745794219976),
+                ast.NumVal(19.778245570310993)),
             ast.BinNumOpType.ADD),
         ast.NumVal(0.5),
         ast.BinNumOpType.MUL)