BLD: Set numpy latest supported version to 1.26 (#607)

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 envlist =
     py{37,38,39,310,311}-test{,-all}{,-dev,-latest,-oldest}{,-cov}
-    py{37,38,39,310,311}-test-numpy{116,117,118,119,120,121,122,123,124,125}
+    py{37,38,39,310,311}-test-numpy{116,117,118,119,120,121,122,123,124,125,126}
     py{37,38,39,310,311}-test-scipy{12,13,14,15,16,17,18,19,110,111}
     py{37,38,39,310,311}-test-astropy{40,41,42,43,50,51,52,53}
     build_docs
@@ -46,6 +46,7 @@ description =
     numpy123: with numpy 1.23.*
     numpy124: with numpy 1.24.*
     numpy125: with numpy 1.25.*
+    numpy125: with numpy 1.26.*
     scipy12: with scipy 1.2.*
     scipy13: with scipy 1.3.*
     scipy14: with scipy 1.4.*
@@ -78,6 +79,7 @@ deps =
     numpy123: numpy==1.23.*
     numpy124: numpy==1.24.*
     numpy125: numpy==1.25.*
+    numpy125: numpy==1.26.*
 
     scipy12: scipy==1.2.*
     scipy13: scipy==1.3.*
@@ -104,7 +106,7 @@ deps =
     dev: git+https://github.com/astropy/astropy.git#egg=astropy
 
     latest: astropy==5.3.*
-    latest: numpy==1.25.*
+    latest: numpy==1.26.*
     latest: scipy==1.11.*
 
     oldest: astropy==4.0.*