Sparse-ir

[Diff since v0.15.0](https://github.com/SpM-lab/SparseIR.jl/compare/v0.15.0...v0.16.0)

[Diff since v0.14.0](https://github.com/SpM-lab/SparseIR.jl/compare/v0.14.0...v0.15.0)


**Closed issues:**
- release (1)

[Diff since v0.13.1](https://github.com/SpM-lab/SparseIR.jl/compare/v0.13.1...v0.14.0)


**Closed issues:**
- Reduce exported symbols (11)
- Bug for SVD with Double64 (12)
- Weird error with Julia 1.6 (13)
- Error with Julia 1.6 (14)
- Typing of interface (16)

**Merged pull requests:**
- Julia1.6 (15) (shinaoka)

[Diff since v0.13.0](https://github.com/SpM-lab/SparseIR.jl/compare/v0.13.0...v0.13.1)

[Diff since v0.12.0](https://github.com/SpM-lab/SparseIR.jl/compare/v0.12.0...v0.13.0)


**Closed issues:**
- Adjust Twork for small ε (4)
- Conflicting symbol names (`beta`) (8)

**Merged pull requests:**
- Add truncated SVD routines (7) (mwallerb)
- CompatHelper: add new compat entry for DoubleFloats at version 1, (keep existing compat) (9) (github-actions[bot])
- Remove dependence LowRankApprox (10) (shinaoka)

[Diff since v0.11.0](https://github.com/SpM-lab/SparseIR.jl/compare/v0.11.0...v0.12.0)


**Closed issues:**
- Perfomance of evaluating uhat (6)