Temporarily pin to `scipy<1.8.0`

The new SciPy release has a restructured `scipy.signal` namespace and some imports in Aesara need to be refactored accordingly. This will most probably increase the lower limit on the SciPy version. See tracking issue #810.

Temporarily pin to `scipy<1.8.0`
38d7a813 · Michael Osthege · Brandon T. Willard · 24501862 · 38d7a813 · 38d7a813
--- a/environment.yml
+++ b/environment.yml
@@ -10,7 +10,7 @@ dependencies:
  - python
  - compilers
  - numpy>=1.17.0
-  - scipy>=0.14
+  - scipy>=0.14,<1.8.0
  - filelock
  - etuples
  - logical-unification

--- a/setup.py
+++ b/setup.py
@@ -46,7 +46,7 @@ CLASSIFIERS = [_f for _f in CLASSIFIERS.split("\n") if _f]
 install_requires = [
    "numpy>=1.17.0",
-    "scipy>=0.14",
+    "scipy>=0.14,<1.8.0",
    "filelock",
    "etuples",
    "logical-unification",