Pydsge

Minor bugfixes

**Full Changelog**: https://github.com/gboehl/pydsge/compare/0.2.3...0.2.4

Add sympy >= 1.12 dependcy

**Full Changelog**: https://github.com/gboehl/pydsge/compare/0.2.2...0.2.3

* Fix example for testing
* Fix bug related to new version of sympy

**Full Changelog**: https://github.com/gboehl/pydsge/compare/0.2.1...0.2.2

**Full Changelog**: https://github.com/gboehl/pydsge/compare/0.2.0...0.2.1

**Full Changelog**: https://github.com/gboehl/pydsge/compare/0.1.7...0.2.0

**Full Changelog**: https://github.com/gboehl/pydsge/compare/0.1.0...0.1.7


bgs_version
Reference version used for Boehl, Goy & Strobel: "A Struktural Investigation of Quantitative Easing".

The results are exactly replicable with this code.