Rio-tiler

* add support for setting the S3 endpoint url scheme via the `AWS_HTTPS` environment variables in `aws_get_object` function using boto3 (https://github.com/cogeotiff/rio-tiler/pull/476)
* Add semicolon `;` support for multi-blocks expression (https://github.com/cogeotiff/rio-tiler/pull/479)
* add `rio_tiler.expression.get_expression_blocks` method to split expression (https://github.com/cogeotiff/rio-tiler/pull/479)
* add `merged_statistics` method for `MultiBaseReader` to get statistics using between assets expression (https://github.com/cogeotiff/rio-tiler/pull/478)

**future deprecation**

* using a comma `,` in an expression to define multiple blocks will be replaced by semicolon `;`

python
before
expression = "b1+b2,b2"

new
expression = "b1+b2;b2"


**breaking changes**

* update morecantile requirement to `>=3.1,<4.0`. WebMercatorQuad TMS is now aligned with GDAL and Mercantile TMS definition.

* make sure we raise an HTTP exception when using an invalid STAC url (https://github.com/cogeotiff/rio-tiler/pull/475)

* switch from `functools.lru_cache` to `cachetools.LRUCache` to allow unashable options in `rio_tiler.io.stac.fetch` function (https://github.com/cogeotiff/rio-tiler/pull/471)

* avoid useless call to `transform_bounds` if input/output CRS are equals (https://github.com/cogeotiff/rio-tiler/pull/466)
* make sure `geographic_bounds` don't return inf or nan values (https://github.com/cogeotiff/rio-tiler/pull/467)

* no change since `3.0.0a6`

* add `rio_tiler.utils.resize_array` to resize array to a given width/height (https://github.com/cogeotiff/rio-tiler/pull/463)
* use `resize_array` in `ImageData.create_from_list` to avoid trying merging array of different sizes (https://github.com/cogeotiff/rio-tiler/pull/463)

**breaking changes**

* update `MultiBaseReader` and `MultiBandReader` to be their own abstract classes instead of being subclass of `BaseReader`.
* put `reader` attribute outside of the `__init__` method for `MultiBaseReader` and `MultiBandReader`.