v0.3.0

PlutoTeachingTools v0.3.0

Diff since v0.2.15

• Add Chinese and Russian
• Improve CI testing (JuliaFormatter, Aqua, JET)
• Cleanup of dependencies and compat
• Code formatting cleanup
• Fixed some typeo/bugs

Merged pull requests:

• Add Russian translation (#44) (@kagalenko-m-b)
• Chinese Translation. (#46) (@mathutopia)
• Format code with JuliaFormatter (#47) (@adrhill)
• Add linting tests with Aqua, JET and ExplicitImports, fix bugs (#48) (@adrhill)