0.39.0

• feat: support multiple highlights in a single diagnostic snippet (#248)
• feat: support string concat in dynamic import analysis (#251)
• fix(BREAKING): flip keep_comments to remove_comments (#246)
• fix(diagnostics): don't output trailing blank line in display (#249)
• perf(emit): allow deferring or excluding utf8 conversion (#253)
• perf: lazily create SourceTextInfo (#254)
• perf: turn off jsx transforms for non-jsx compatible files (#252)