Imageio

Fix
* Avoid exception when n_frames is not set by Pillow ([`d03db0f`](https://github.com/imageio/imageio/commit/d03db0f86016fedfe3f225d468609babcc0a81cb))
* Forward get_reader/get_writer kwargs to read/write ([979](https://github.com/imageio/imageio/issues/979)) ([`a82037e`](https://github.com/imageio/imageio/commit/a82037ec400197f018f7a167bcce320e9f6a3da0))
* Allow incremental write in pillow ([978](https://github.com/imageio/imageio/issues/978)) ([`2ed8fb4`](https://github.com/imageio/imageio/commit/2ed8fb4618c9220f705ccf7e47bed24b01128312))
* Add `writeable_output=True` to pillow plugin to ensure data is writable by default ([976](https://github.com/imageio/imageio/issues/976)) ([`6412c98`](https://github.com/imageio/imageio/commit/6412c9808384e19243507eee4eacb1078c405b38))

Other
* Refactor invoke in no-internet CI ([986](https://github.com/imageio/imageio/issues/986)) ([`a945675`](https://github.com/imageio/imageio/commit/a945675d6ba210776ff8188300271f07cab8cfea))
* Fixed typo in CI script ([985](https://github.com/imageio/imageio/issues/985)) ([`a2428d3`](https://github.com/imageio/imageio/commit/a2428d3f7f910bc447e9302b7babe60ad7794f44))
* Fix typo in PyPI link tooltip ([980](https://github.com/imageio/imageio/issues/980)) ([`d2654ba`](https://github.com/imageio/imageio/commit/d2654bafedff7de792863e99d9f0871d36781672))
* Generate images in temporary folders ([977](https://github.com/imageio/imageio/issues/977)) ([`b4fc971`](https://github.com/imageio/imageio/commit/b4fc9713ab28e935425f2d38e8432e22971ec561))

Feature
* Expose v3 plugins via v2 API ([824](https://github.com/imageio/imageio/issues/824)) ([`f3156b7`](https://github.com/imageio/imageio/commit/f3156b777dca535e80826adbb8504a5161110cff))

Fix
* Update FreeImage backend to v3.18.0 on Windows ([960](https://github.com/imageio/imageio/issues/960)) ([`08d3bda`](https://github.com/imageio/imageio/commit/08d3bda3a3c913f172add740d141fdf4a5e2035f))

Feature
* Add `n_images` to `ImageProperties` ([966](https://github.com/imageio/imageio/issues/966)) ([`76d9aed`](https://github.com/imageio/imageio/commit/76d9aed22db5f10e3924f453e320b5ad7d33387a))

Fix
* Consistently apply color palettes by default ([955](https://github.com/imageio/imageio/issues/955)) ([`938de2d`](https://github.com/imageio/imageio/commit/938de2dd17707440f76963c98cc52d28f70961f4))
* Allow ffmpeg filters to terminate iter ([954](https://github.com/imageio/imageio/issues/954)) ([`a463899`](https://github.com/imageio/imageio/commit/a46389977bc2ee7b32e25a310d97ebabb6dfcaec))
* Handle unknown video duration in pyav metadata ([937](https://github.com/imageio/imageio/issues/937)) ([`06a1c0d`](https://github.com/imageio/imageio/commit/06a1c0d454985afa7c66152c16867943c6796bd8))

Other
* Remove pypy 3.7 testing and improve CI/CD scripts ([964](https://github.com/imageio/imageio/issues/964)) ([`b439803`](https://github.com/imageio/imageio/commit/b439803d187fac99a28cbbba632c60c43970dcd3))
* Several doc improvements ([959](https://github.com/imageio/imageio/issues/959)) ([`ecb6773`](https://github.com/imageio/imageio/commit/ecb677377beb98dbeeaac7c39b9b32f88443eb53))
* Add GH Sponsors link ([`0e13f64`](https://github.com/imageio/imageio/commit/0e13f64c5a4b156a58932e733e7b8c3609a872b1))

Feature
* Collection of small improvements to pyav ([939](https://github.com/imageio/imageio/issues/939)) ([`b0dc210`](https://github.com/imageio/imageio/commit/b0dc21074d77894d01ce50ab2a525f214b1e265d))

Fix
* Format hint test doesn't need to establish a connection ([941](https://github.com/imageio/imageio/issues/941)) ([`b7a0f35`](https://github.com/imageio/imageio/commit/b7a0f353a1c7798ddef5eb60927921e276289e25))

Other
* Don't build pdfs on RTD ([944](https://github.com/imageio/imageio/issues/944)) ([`d200673`](https://github.com/imageio/imageio/commit/d200673503e620ac9ec1584a04e358794416e28b))