deps: update backend to 1.2.0

* Update backend version to v1.2.0

* chore: bump minor version due to slight behavior change

---------

Co-authored-by: MilesCranmer <7593028+MilesCranmer@users.noreply.github.com>
Co-authored-by: Miles Cranmer <miles.cranmer@gmail.com>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pysr"
-version = "1.0.2"
+version = "1.1.0"
 authors = [
     {name = "Miles Cranmer", email = "miles.cranmer@gmail.com"},
 ]

pysr/juliapkg.json

@@ -3,7 +3,7 @@
     "packages": {
         "SymbolicRegression": {
             "uuid": "8254be44-1295-4e6a-a16d-46603ac705cb",
-            "version": "=1.1.0"
+            "version": "=1.2.0"
         },
         "Serialization": {
             "uuid": "9e88b42a-f829-5b0c-bbe9-9e923198166b",