* Update pull request template (#1510)

Clarify template to make it easier for contributors to fill in relevant information.

* Temporary workaround for tensorflow_probability dependency issue (#1522)

* pin cloudpickle==1.3.0 as temporary workaround for tensorflow/probability#991 to unblock our build (to be reverted once fixed upstream)

* Update readme with new project using GPflow (#1530)

* fix bug in varying_noise notebook (#1526)

* Fix formatting in docs (intro.md) and restore link removed by #1498 (#1520)

* pin tensorflow<2.3 tensorflow-probability<0.11 (#1537)

* Quadrature Refactoring (#1505)

* WIP: quadrature refactoring

* Removing old ndiagquad code

* deleted test code

* formatting and type-hint

* merge modules

* black formatting

* formatting

* solving failing tests

* fixing failing tests

* fixes

* adapting tests for new syntax, keeping numerical behavior

* black formatting

* remove printf

* changed code for compiled tf compatibility

* black

* restored to original version

* undoing changes

* renaming

* renaming

* renaming

* reshape kwargs

* quadrature along axis=-2, simplified broadcasting

* black

* docs

* docs

* helper function

* docstrings and typing

* added new and old quadrature equivalence tests

* black

* Removing comments

Co-authored-by: Vincent Dutordoir <dutordoirv@gmail.com>

* Typo

Co-authored-by: Vincent Dutordoir <dutordoirv@gmail.com>

* notation

Co-authored-by: Vincent Dutordoir <dutordoirv@gmail.com>

* reshape_Z_dZ return docstring fix

* FIX: quad_old computed with the ndiagquad_old

Co-authored-by: Vincent Dutordoir <dutordoirv@gmail.com>

* more readable implementation

Co-authored-by: Vincent Dutordoir <dutordoirv@gmail.com>

* tf.ensure_shape added

* removed ndiagquad

* removed ndiagquad

* Revert "removed ndiagquad"

This reverts commit 7bb0e9f1e0f2b0e225a2b8a5b3092c4c2f24ba91.

* FIX: shape checking of dZ

* Revert "removed ndiagquad"

This reverts commit 8e235241a697696e361158c30ff9aa9b4cc69f8a.

Co-authored-by: Gustavo Carvalho <gustavo.carvalho@delfosim.com>
Co-authored-by: ST John <st@prowler.io>
Co-authored-by: Vincent Dutordoir <dutordoirv@gmail.com>

* Add base_conditional_with_lm function (#1528)

* Added base_conditional_with_lm function, which accepts Lm instead of Kmm

Co-authored-by: Neil Ferguson <neil@prowler.io>
Co-authored-by: Vincent Dutordoir <dutordoirv@gmail.com>
Co-authored-by: st-- <st--@users.noreply.github.com>

* Fixed separate_independent_conditional to correctly handle q_sqrt=None. (#1533)

* Fixed separate_independent_conditional to correctly handle q_sqrt=None.

Co-authored-by: Aidan Scannell <scannell.aidan@gmail.com>
Co-authored-by: st-- <st--@users.noreply.github.com>

* Bump version numbers to 2.1.0. (#1544)

* Re-introduce pytest-xdist (#1541)

Enables pytest-xdist for locally running tests (`make test`) on multiple cores in parallel.

* check dependency versions are valid on CI (#1536)

* Update to not use custom image (#1545)

* Update to not use custom image

* Add test requirements

* Update parameter to be savable (#1518)

* Fix for quadrature failure mode when autograph was set to False (#1548)

* Fix and test

* Change shape of quadrature tensors for better broadcasting (#1542)

* using the first dimension to hold the quadrature summation

* adapting ndiagquad wrapper

* Changed bf for bX in docstrings

Co-authored-by: Gustavo Carvalho <gustavo.carvalho@delfosim.com>
Co-authored-by: st-- <st--@users.noreply.github.com>
Co-authored-by: Vincent Dutordoir <dutordoirv@gmail.com>

* Update min TFP supported version to 0.10 (#1551)

* Broadcasting constant and zero mean function (#1550)

* Broadcasting constant and zero mean function

* Use rank instead of ndim

Co-authored-by: st-- <st--@users.noreply.github.com>
Co-authored-by: joelberkeley-pio <joel.berkeley@prowler.io>
Co-authored-by: gustavocmv <47801305+gustavocmv@users.noreply.github.com>
Co-authored-by: Gustavo Carvalho <gustavo.carvalho@delfosim.com>
Co-authored-by: ST John <st@prowler.io>
Co-authored-by: Neil Ferguson <nfergu@users.noreply.github.com>
Co-authored-by: Neil Ferguson <neil@prowler.io>
Co-authored-by: Aidan Scannell <as12528@my.bristol.ac.uk>
Co-authored-by: Aidan Scannell <scannell.aidan@gmail.com>
Co-authored-by: Sandeep Tailor <s.tailor@insysion.net>
Co-authored-by: Artem Artemev <art.art.v@gmail.com>