Merge pull request mercari#102 from mercari/gaurun-0.10.0

bumped version to 0.10.0

Merge pull request mercari#100 from mercari/gauru-0.9.1

bumped version to 0.9.1.

Merge pull request mercari#85 from mercari/v0.9.0

bumped version to 0.9.0.

bumped version to 0.8.1.

bumped version to 0.8.0.

bumped version to 0.7.1.

bumped version to 0.7.0.

bumped version to 0.6.1.

bumped version to 0.6.0.

bumped version to 0.5.2.