handle the fact that latest conda does not support python 3.7

Author: mjohnson541

deps/build.jl

@@ -2,7 +2,13 @@ using PyCall
 if PyCall.pyversion.major != 3 || PyCall.pyversion.minor != 7
     using Conda
     const Pkg = Base.require(Base.PkgId(Base.UUID("44cfe95a-1eb2-52ea-b672-e2afdf69b78f"), "Pkg"))
-    Conda.add("python=3.7")
+    try
+        Conda.add("python=3.7")
+    catch e
+        Conda.add("conda=22")
+        Conda.add("python=3.7")
+    end
+    
     try
         Conda.rm("numpy") #get around MKL problem
     catch e