CompatHelper: bump compat for "ApproxFun" to "0.12" (#138)

* CompatHelper: bump compat for "ApproxFun" to "0.12"

* Test on 1.5

* v0.6.5

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Sheehan Olver <solver@mac.com>

Author: github-actions[bot]

.travis.yml

@@ -5,7 +5,7 @@ os:
   - osx
 julia:
   - 1.3
-  - 1.4
+  - 1.5
   - nightly
 matrix:
   allow_failures:

Project.toml

@@ -1,6 +1,6 @@
 name = "SingularIntegralEquations"
 uuid = "e094c991-5a90-5477-8896-c1e4c9552a1a"
-version = "0.6.4"
+version = "0.6.5"
 
 [deps]
 ApproxFun = "28f2ccd6-bb30-5033-b560-165f7b14dc2f"
@@ -18,7 +18,7 @@ SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
-ApproxFun = "0.11.8"
+ApproxFun = "0.11.8, 0.12"
 ApproxFunBase = "0.2.3, 0.3"
 ApproxFunFourier = "0.2"
 ApproxFunOrthogonalPolynomials = "0.3"