Gr

[Diff since v0.66.0](https://github.com/jheinen/GR.jl/compare/v0.66.0...v0.66.2)



**Merged pull requests:**
- precompile: only call when generating output (451) (sjkelly)

[Diff since v0.66.0](https://github.com/jheinen/GR.jl/compare/v0.66.0...v0.66.1)



**Merged pull requests:**
- precompile: only call when generating output (451) (sjkelly)

[Diff since v0.65.1](https://github.com/jheinen/GR.jl/compare/v0.65.1...v0.66.0)

[Diff since v0.64.4](https://github.com/jheinen/GR.jl/compare/v0.64.4...v0.65.1)


**Closed issues:**
- GR segfaults for Plots.jl contour plots (457)
- Contour plot color issue (458)

**Merged pull requests:**
- reduce allocation and improve efficiency of heatmap (459) (sjkelly)
- Tweak log "Error importing GR_jll" (460) (fonsp)
- Add CompatHelper (461) (JackDunnNZ)
- CompatHelper: bump compat for HTTP to 1, (keep existing compat) (462) (github-actions[bot])
- CompatHelper: bump compat for RelocatableFolders to 0.3, (keep existing compat) (463) (github-actions[bot])
- Misc compilation and memory optimizations (464) (sjkelly)

[Diff since v0.64.3](https://github.com/jheinen/GR.jl/compare/v0.64.3...v0.64.4)


**Closed issues:**
- log2 y-axis scaling does not work (191)
- Building on M1 Mac (456)

**Merged pull requests:**
- Fix Union Split in `get_func_ptr` (455) (sjkelly)