CHANGELOG updates

CHANGELOG.md

@@ -1,7 +1,25 @@
 # Next
 
 Git diff:
-* https://github.com/readium/r2-shared-js/compare/v1.0.0-alpha.5...develop
+* https://github.com/readium/r2-shared-js/compare/v1.0.0-alpha.6...develop
+
+# 1.0.0-alpha.6
+
+> Build environment: NodeJS `8.12.0`, NPM `6.4.1`
+
+Changes:
+* NPM updates (minor)
+* Git revision JSON info now includes NodeJS and NPM version (build environment)
+
+Git revision info:
+* https://unpkg.com/[email protected]/dist/gitrev.json
+* https://github.com/edrlab/r2-shared-js-dist/blob/v1.0.0-alpha.6/dist/gitrev.json
+
+Git commit history:
+* https://github.com/readium/r2-shared-js/commits/v1.0.0-alpha.6
+
+Git diff:
+* https://github.com/readium/r2-shared-js/compare/v1.0.0-alpha.5...v1.0.0-alpha.6
 
 # 1.0.0-alpha.5