fix(core): serialization patch (#34455)

- `allowed_objects` kwarg in `load`
- escape lc-ser formatted dicts on `dump`
- fix for jinja2

---------

Co-authored-by: Mason Daugherty <github@mdrxy.com>

libs/partners/anthropic/uv.lock

@@ -495,7 +495,7 @@ wheels = [
 
 [[package]]
 name = "langchain"
-version = "1.1.3"
+version = "1.2.0"
 source = { editable = "../../langchain_v1" }
 dependencies = [
     { name = "langchain-core" },
@@ -642,7 +642,7 @@ typing = [
 
 [[package]]
 name = "langchain-core"
-version = "1.2.0"
+version = "1.2.4"
 source = { editable = "../../core" }
 dependencies = [
     { name = "jsonpatch" },
@@ -702,7 +702,7 @@ typing = [
 
 [[package]]
 name = "langchain-tests"
-version = "1.1.0"
+version = "1.1.1"
 source = { editable = "../../standard-tests" }
 dependencies = [
     { name = "httpx" },