New package stream_transform

diff --git a/pkgs/stream_transform/.gitignore b/pkgs/stream_transform/.gitignore
new file mode 100644
index 0000000..47f11e5
--- /dev/null
+++ b/pkgs/stream_transform/.gitignore

@@ -0,0 +1,5 @@
+.pub/
+build/
+packages
+pubspec.lock
+.packages

diff --git a/pkgs/stream_transform/analysis_options.yaml b/pkgs/stream_transform/analysis_options.yaml
new file mode 100644
index 0000000..590a8e5
--- /dev/null
+++ b/pkgs/stream_transform/analysis_options.yaml

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+analyzer:
+  strong-mode: true
+  errors:
+    unused_import: error
+    unused_local_variable: error
+    dead_code: error
+    override_on_non_overriding_method: error
+
+linter:
+  rules:
+    # Errors
+    - avoid_empty_else
+    # Wait for FutureOr to work
+    #- await_only_futures
+    - comment_references
+    - control_flow_in_finally
+    - empty_statements
+    - hash_and_equals
+    - test_types_in_equals
+    - throw_in_finally
+    - unawaited_futures
+    - unrelated_type_equality_checks
+    - valid_regexps
+
+    # Style
+    - annotate_overrides
+    - avoid_init_to_null
+    - avoid_return_types_on_setters
+    - camel_case_types
+    - empty_catches
+    - empty_constructor_bodies
+    - library_names
+    - library_prefixes
+    - non_constant_identifier_names
+    - prefer_is_not_empty
+    - slash_for_doc_comments
+    - type_init_formals

diff --git a/pkgs/stream_transform/pubspec.yaml b/pkgs/stream_transform/pubspec.yaml
new file mode 100644
index 0000000..129aa9c
--- /dev/null
+++ b/pkgs/stream_transform/pubspec.yaml

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+name: stream_transform
+description: A collection of utilities to transform and manipulate streams.
+author: Dart Team <misc@dartlang.org>
+homepage: https://www.github.com/dart-lang/stream_transform
+
+environment:
+  sdk: ">=1.22.0 <2.0.0"
+
+dev_dependencies:
+  test: ^0.12.0