Resolving Issue 85: TypeError in coatingthermal with old version of numpy

Resolving the issue mentioned in Issue 85 regarding the behavior of np.flip in numpy versions before 1.15. Modern np.flip has a default axis option while older versions required you to give an axis specifically. We are only flipping 1-dimensional arrays so I have replaced all np.flip with np.flipud which is equivalent to calling np.flip(m, 0). This should solve the issue. However, locally I could not confirm this as I was having segmentation fault error. The local CI test also couldn't pass due to a problem with all package. So hopefully, the reviewers can test this branch in the appropriate place. I don't see a reason for why this would fail with older numpy versions now.

gwinc/__init__.py

@@ -13,7 +13,7 @@ except ModuleNotFoundError:
         __version__ = setuptools_scm.get_version(fallback_version='?.?.?')
     # FIXME: fallback_version is not available in the buster version
     # (3.2.0-1)
-    except (ModuleNotFoundError, TypeError):
+    except (ModuleNotFoundError, TypeError, LookupError):
         __version__ = '?.?.?'
 from .ifo import IFOS
 from .struct import Struct
@@ -116,7 +116,7 @@ def load_budget(name_or_path, freq=None):
 
     else:
         if name_or_path not in IFOS:
-            raise RuntimeError("Unknonw IFO '{}' (available IFOs: {}).".format(
+            raise RuntimeError("Unknown IFO '{}' (available IFOs: {}).".format(
                 name_or_path,
                 IFOS,
             ))