v0.1.15

upgrade to mdbook v0.4.40

v0.1.14

upgrade dependencies, most notably:

• mdbook v0.4.37
• pulldown-cmark v0.10.0
• pulldown-cmark-to-cmark v12.0.0

v0.1.12

upgrade to mdbook v0.4.36

v0.1.11

upgrade to mdbook v0.4.35

v0.1.10

upgrade to mdbook v0.4.34

v0.1.9

upgrade to mdbook v0.4.32

v0.1.8

upgrade to mdbook v0.4.31

v0.1.7

upgrade to mdbook v0.4.30

v0.1.6

upgrade to mdbook v0.4.29

v0.1.5

• supports multiple markup tags
• fix CI