Try to improve docs to address issue #58.

This library only supports JSON5 documents. It cannot
parse everything that is legal JavaScript. For example,
an object with an integer key is legal in JS, but
not in JSON5. I've updated the text to reflect this.
diff --git a/README.md b/README.md
index ec846d1..d1cf08c 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,10 @@
 **SLOW**. It can be 1000-6000x slower than the C-optimized JSON module,
 and is 200x slower (or more) than the pure Python JSON module.
 
+**Please Note:** This library only handles JSON5 documents, it does not
+allow you to read arbitrary JavaScript. For example, bare integers can
+be legal object keys in JavaScript, but they aren't in JSON5.
+
 ## Known issues
 
 * Did I mention that it is **SLOW**?
@@ -57,6 +61,11 @@
 
 ## Version History / Release Notes
 
+* v0.9.10 (2022-08-18)
+    * [GitHub issue #58](https://github.com/dpranke/pyjson5/issues/58)
+      Updated the //README.md to be clear that parsing arbitrary JS
+      code may not work.
+    * Otherwise, no code changes.
 * v0.9.9 (2022-08-01)
     * [GitHub issue #57](https://github.com/dpranke/pyjson5/issues/57)
       Fixed serialization for objects that subclass `int` or `float`:
diff --git a/json5/version.py b/json5/version.py
index 0a39014..bd14033 100644
--- a/json5/version.py
+++ b/json5/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-VERSION = '0.9.9'
+VERSION = '0.9.10'