v0.3.0

Some big changes over 0.2, including:

A rewrite to simplify a lot of the internals
Much improved outputs that show a snippet of any offending code
Use a updated version of tree-sitter-fortran that can handle more pre-processor statements
Many new rules

What's Changed

Add precision category by @LiamPattinson in #34
Add release info to README.dev.md by @LiamPattinson in #37
Better AST methods by @LiamPattinson in #41
Bugfix: newline printed for files without rule violations by @LiamPattinson in #42
Print context of violations by @ZedThree in #45
Overhaul core by @LiamPattinson in #46
Update tree-sitter-fortran to v0.1.0 by @ZedThree in #47
Return multiple violations from rules by @ZedThree in #49
Add rule for missing intent attribute by @ZedThree in #50
Fix clippy warnings by @ZedThree in #51
Fix clippy warning, update pre-commit hook by @LiamPattinson in #52
Add check for old-style array literals (/.../) by @ZedThree in #54
Add rule for missing label on exit/cycle by @ZedThree in #53
Convert AST free functions into a trait by @ZedThree in #59
Add rule for assumed size dummy arguments by @ZedThree in #57
Add rule for initialisation in declarations by @ZedThree in #72
Column number for text rules by @ZedThree in #58
Add rules for character assumed size issues by @ZedThree in #75
Implicit real kinds rule by @LiamPattinson in #81
Fix incorrect test name for implicit real kinds rule by @LiamPattinson in #83
Add rule for deprecated relational operators by @ZedThree in #82
Add rule for non-explicit end statements by @LiamPattinson in #84
Update version to 0.3.0 by @LiamPattinson in #80

Full Changelog: v0.2.0...v0.3.0