v0.6.4

• matUtils updates: new subcommand "fix"; improvements to MAT::Tree:move_node and mask --move-nodes by @AngieHinrichs in #357
• Create CODE_OF_CONDUCT.md by @russcd in #359
• Fix auspice radial and unrooted views by @aofarrel in #371
• Add --anchor-samples option to add specific sequences to subtrees by @AngieHinrichs in #377
• matUtils extract --reroot: retain rerooted leaf, rename leaf from former internal node by @AngieHinrichs in #380
• Update base image, fix #370 by @aofarrel in #381
• new_mask_function_part2 by @lilymaryam in #385
• matOptimize: Allow -D option by @AngieHinrichs in #386