Update changelog

CHANGELOG.md

 ## 1.14.0
 
 ### Core library changes
 * `dart:math`
   * `Random` added a `secure` constructor returning a cryptographically secure
     random generator which reads from the entropy source provided by the
     embedder for every generated random value.
 
 ## 1.13.0
 
@@ skipping 29 matching lines @@
 * `docgen` and 'dartdocgen' no longer ship in the sdk. The `docgen` sources have
    been removed from the repository.
 
 * This is the last release to ship the VM's "legacy debug protocol".
   We intend to remove the legacy debug protocol in Dart VM 1.14.
 
 * The VM's Service Protocol has been updated to version 3.0 to take care
   of a number of issues uncovered by the first few non-observatory
   clients.  This is a potentially breaking change for clients.
 
-## 1.12.0
+## 1.12.2 - 2015-10-21
+
+### Core library changes
+
+* `dart:io`
+
+  * A memory leak in creation of Process objects is fixed.
+
+## 1.12.1 - 2015-09-08
+
+### Tool changes
+
+* Pub
+
+  * Pub will now respect `.gitignore` when validating a package before it's
+    published. For example, if a `LICENSE` file exists but is ignored, that is
+    now an error.
+
+  * If the package is in a subdirectory of a Git repository and the entire
+    subdirectory is ignored with `.gitignore`, pub will act as though nothing
+    was ignored instead of uploading an empty package.
+
+  * The heuristics for determining when `pub get` needs to be run before various
+    commands have been improved. There should no longer be false positives when
+    non-dependency sections of the pubspec have been modified.
+
+## 1.12.0 - 2015-08-31
 
 ### Language changes
 
 * Null-aware operators
     * `??`: if null operator. `expr1 ?? expr2` evaluates to `expr1` if not `null`, otherwise `expr2`.
     * `??=`: null-aware assignment. `v ??= expr` causes `v` to be assigned `expr` only if `v` is `null`.
     * `x?.p`: null-aware access. `x?.p` evaluates to `x.p` if `x` is not `null`, otherwise evaluates to `null`.
     * `x?.m()`: null-aware method invocation. `x?.m()` invokes `m` only if `x` is not `null`.
 
 ### Core library changes
@@ skipping 152 matching lines @@
 * The service protocol now includes a `"jsonrpc"` property in its responses, as
   opposed to `"json-rpc"`.
 
 * The service protocol now properly handles requests with non-string ids.
   Numeric ids are no longer converted to strings, and null ids now don't produce
   a response.
 
 * Some RPCs that didn't include a `"jsonrpc"` property in their responses now
   include one.
 
-## 1.11.2
+## 1.11.2 - 2015-08-03
 
 ### Core library changes
 
 * Fix a bug where `WebSocket.close()` would crash if called after
   `WebSocket.cancel()`.
 
-## 1.11.1
+## 1.11.1 - 2015-07-02
 
 ### Tool changes
 
 * Pub will always load Dart SDK assets from the SDK whose `pub` executable was
   run, even if a `DART_SDK` environment variable is set.
 
 ## 1.11.0 - 2015-06-25
 
 ### Core library changes
 
@@ skipping 329 matching lines @@
     they will keep the Dart process alive until they time out. This fixes the
     handling of persistent connections. Previously, the client would shut down
     immediately after a request.
 
   * **Breaking change:** `HttpServer` no longer compresses all traffic by
     default. The new `autoCompress` property can be set to `true` to re-enable
     compression.
 
 * `dart:isolate`: `Isolate.spawnUri` added the optional `packageRoot` argument,
   which controls how it resolves `package:` URIs.