Update all Angular libs (run update_all.sh).

third_party/pkg/di/CHANGELOG.md

Index: third_party/pkg/di/CHANGELOG.md
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+# 0.0.38
+
+## Fixes
+
+- **key:** made Key part of di.dart again
+  ([fe390ddf](https://github.com/angular/di.dart/commit/fe390ddf25c230e2c98cff0628297e42584f6945))
+
+
+# 0.0.37
+
+Combined with previous release (0.0.36) injector is on average 2x faster.
+
+Before:
+```
+VM:
+DynamicInjectorBenchmark(RunTime): 231.93784065870346 us.
+StaticInjectorBenchmark(RunTime): 107.05491917353602 us.
+
+dart2js:
+DynamicInjectorBenchmark(RunTime): 2175 us.
+StaticInjectorBenchmark(RunTime): 765.1109410864575 us.
+```
+
+After:
+
+```
+VM:
+DynamicInjectorBenchmark(RunTime): 156.3721657544957 us.
+StaticInjectorBenchmark(RunTime): 54.246114622040196 us.
+
+dart2js:
+DynamicInjectorBenchmark(RunTime): 1454.5454545454545 us.
+StaticInjectorBenchmark(RunTime): 291.9281856663261 us.
+```
+
+## Bug Fixes
+
+- **warnings:** refactored injector to fix analyzer warnings
+  ([7d374b19](https://github.com/angular/di.dart/commit/7d374b196e795d9799c95a4e63cf497267604de9))
+
+## Performance Improvements
+
+- **injector:**
+  - Make resolving a linked-list stored with the frame
+  ([c588e662](https://github.com/angular/di.dart/commit/c588e662ab0f33dc645c8e170492c0c25c1085a5))
+  - Do not closurize methods.
+  ([5f47cbd0](https://github.com/angular/di.dart/commit/5f47cbd0dc28cb16e497baf5cfda3c6499f56eb5))
+  - Do not check the circular dependency until we are 30 deep.
+  ([1dedf6e3](https://github.com/angular/di.dart/commit/1dedf6e38fec4c3fc882ef59b4c4bf439d19ce0a))
+  - Track resolving keys with the frame.
+  ([17aeb4df](https://github.com/angular/di.dart/commit/17aeb4df59465c22cd73ae5c601cb8d0f872c57b))
+- **resolvedTypes:** minor performance inmprovement in resolvedTypes
+  ([ba16bde5](https://github.com/angular/di.dart/commit/ba16bde5084eb3a2291ca3d2fb38de06ac734b03))
+
+
+# 0.0.36
+
+## Performance Improvements
+
+- **injector:**
+  - skip _checkKeyConditions in dart2js
+  ([6763552a](https://github.com/angular/di.dart/commit/6763552adccdc41ef1043930ea50e0425509e6c5))
+  - +29%. Use an array for type lookup instead of a map.
+