docs: Add CHANGELOG entry for v0.3.0 (#173)

CHANGELOG.md

@@ -1,5 +1,39 @@
 # ChangeLog
 
+## v0.3.0
+
+scip schema:
+
+- Several new fields were added:
+  [`SymbolInformation.signature_documentation`](https://github.com/sourcegraph/scip/pull/159),
+  [`SymbolInformation.display_name`](https://github.com/sourcegraph/scip/pull/158),
+  [`SymbolInformation.kind`](https://github.com/sourcegraph/scip/pull/156)
+  [`Occurrence.enclosing_range`](https://github.com/sourcegraph/scip/pull/150)
+
+scip CLI:
+
+- The `print` subcommand supports a new `--json` flag to emit JSON output
+  instead of colored textual output. (https://github.com/sourcegraph/scip/pull/147)
+- The `snapshot` subcommand supports a new `--comment-syntax` flag
+  to customize the prefix used for inline comments in snapshot output.
+  (https://github.com/sourcegraph/scip/pull/139)
+- `snapshot` output now include override_documentation for occurrences.
+  (https://github.com/sourcegraph/scip/pull/116)
+
+Go bindings:
+
+- Adds API for parsing indexes in a streaming fashion.
+  (https://github.com/sourcegraph/scip/pull/172)
+- Fixed a panic when descriptors are incomplete
+  (https://github.com/sourcegraph/scip/pull/171)
+
+Rust bindings:
+
+- Fixes a bug when emitting symbols which require escaping
+  (https://github.com/sourcegraph/scip/pull/169)
+- Fixes a bug in handling for macro symbols
+  (https://github.com/sourcegraph/scip/pull/145)
+
 ## v0.2.3
 
 ### Fixes

cmd/version.txt

@@ -1 +1 @@
-0.2.3
+0.3.0