Version 1.26.0

New functionality

• Add variable support to Transformation.opacity() (#209)
• Add support for restoring deleted datasource entries (#207)
• Add support for 32 char SHA-256 URL signatures.
• Add support for pow operator in expressions (#198)
• Add signature checking methods (#193)

Other changes

• Fix handling of max_results and next_cursor parameters for folders api (#203)
• Fix normalize_expression when a keyword is used in a variable name (#205)