Update version to 0.18.1.
MODIFY
CHANGELOG.md
CHANGELOG.md
## Unreleased
+## Version 0.18.1
+
### Bug Fixes
- Fixed an issue with the annotation key handler (#923)

MODIFY
package-lock.json
package-lock.json
{
"name": "geojs",
- "version": "0.18.0",
+ "version": "0.18.1",
"lockfileVersion": 1,
"requires": true,
"dependencies": {

MODIFY
package.json
package.json
{
"name": "geojs",
- "version": "0.18.0",
+ "version": "0.18.1",
"description": "JavaScript Geo visualization and Analysis Library",
"homepage": "https://github.com/OpenGeoscience/geojs",
"license": "Apache-2.0",

Update version to 0.18.1.