[MRG] Fixes issue PythonOT#239 (deprecated numpy types) (PythonOT#244)

* remove warning numpy int?

* use long long

* stoupid mistake

* cleanup double test run in PR from local branch

.github/workflows/build_tests.yml

@@ -3,9 +3,11 @@ name: Tests
 on:
   workflow_dispatch:
   pull_request:
+    branches:
+      - 'master'    
   push:
     branches:
-      - '**'  
+      - 'master'  
   create:
     branches:
       - 'master'

ot/lp/emd_wrap.pyx

@@ -97,8 +97,6 @@ def emd_c(np.ndarray[double, ndim=1, mode="c"] a, np.ndarray[double, ndim=1, mod
     cdef np.ndarray[double, ndim=2, mode="c"] G=np.zeros([0, 0])
 
     cdef np.ndarray[double, ndim=1, mode="c"] Gv=np.zeros(0)
-    cdef np.ndarray[long, ndim=1, mode="c"] iG=np.zeros(0,dtype=np.int)
-    cdef np.ndarray[long, ndim=1, mode="c"] jG=np.zeros(0,dtype=np.int)
 
     if not len(a):
         a=np.ones((n1,))/n1
@@ -169,8 +167,8 @@ def emd_1d_sorted(np.ndarray[double, ndim=1, mode="c"] u_weights,
 
     cdef np.ndarray[double, ndim=1, mode="c"] G = np.zeros((n + m - 1, ),
                                                            dtype=np.float64)
-    cdef np.ndarray[long, ndim=2, mode="c"] indices = np.zeros((n + m - 1, 2),
-                                                              dtype=np.int)
+    cdef np.ndarray[long long, ndim=2, mode="c"] indices = np.zeros((n + m - 1, 2),
+                                                              dtype=np.int64)
     cdef Py_ssize_t cur_idx = 0
     while True:
         if metric == 'sqeuclidean':