feat: Implement exposure (#2173)

* feat: Implement `exposure` (iOS)

* Update Podfile.lock

* Format

* Expose exposure in format

* Set exposure in Camera2

* fix: Fix exposure calculation

* Add exposure docs

package/src/CameraDevice.ts

@@ -80,6 +80,14 @@ export interface CameraDeviceFormat {
    * Minimum supported ISO value
    */
   minISO: number
+  /**
+   * The minimum Exposure-Bias value this format supports. When setting the `exposure` to this value, the image is almost completely dark (under-exposed).
+   */
+  minExposure: number
+  /**
+   * The maximum Exposure-Bias value this format supports. When setting the `exposure` to this value, the image is almost completely bright (over-exposed).
+   */
+  maxExposure: number
   /**
    * The video field of view in degrees
    */