Bump numpy from 1.18.0 to 1.21.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.18.0 to 1.21.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/HOWTO_RELEASE.rst)
- [Commits](https://github.com/numpy/numpy/compare/v1.18.0...v1.21.0

)

---
updated-dependencies:
- dependency-name: numpy
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

protobuf 4.21 breaks onnx so freezing it as a workaround

see discussion here:
https://github.com/protocolbuffers/protobuf/issues/10051

FINN v0.7

Fixes #344

Fixed off by one error in SIMD check for StreamingFCLayer_Batch.

Merge branch 'feature/support_1d_swg_simple' of https://github.com/fpjentzsch/finn into fpjentzsch-feature/support_1d_swg_simple

Merge branch 'bugfix/absorb_transpose' of https://github.com/mmrahorovic/finn into mmrahorovic-bugfix/absorb_transpose

Support for ingesting models in the QONNX format