v0.6.5

Express v0.6.5

Diff since v0.6.4

Merged pull requests:

• Update CI files (#200) (@singularitti)
• Fix @repl to julia-repl in docs (#201) (@singularitti)
• Deprecate myuparse, use @u_str (#202) (@singularitti)
• Revert some bad decisions in #202 (#203) (@singularitti)