Merge pull request mbj#1221 from mbj/add/beginless-range-mutations

Add support for beginless range mutations

Merge pull request mbj#1202 from mbj/add-sum-mutations

Add `#reduce` -> `#sum` mutations

Merge pull request mbj#1211 from mbj/prepare/release

Change version to 0.10.26

Merge pull request mbj#1198 from mbj/fix/expression-parser

Fix expression transform to conform to transform interface

Merge pull request mbj#1185 from mbj/fix/cli-subject-overwrite

Fix CLI provided subject expressions to overwrite config file

Merge pull request mbj#1182 from mbj/change/version

Change version to 0.10.23

Merge pull request mbj#1180 from mbj/fix/readme

Fix readme syntax

Merge pull request mbj#1175 from mbj/bump/version

Change version to 0.10.21

Merge pull request mbj#1159 from mbj/simplify/expression

Change expression details to avoid memoization

Merge pull request mbj#1158 from mbj/fix/required-mutant-version

Change to strict integration version bounds