bump optim (#80)

* bump optim

* valid spec

* travis update

Author: tlienart

.travis.yml

@@ -4,20 +4,21 @@ os:
   - linux
 julia:
   - 1.0
-  - 1.4
+  - 1.5
   - nightly
-notifications:
-  email: false
-after_success:
-  # push coverage results to Codecov
-  - julia -e 'using Pkg; pkg"add Coverage"; using Coverage; Codecov.submit(Codecov.process_folder())'
-
-jobs:
+matrix:
+  allow_failures:
+    - julia: nightly
   include:
     - stage: "Documentation"
-      julia: 1.4
+      julia: 1.5
       os: linux
       script:
         - julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd()));Pkg.instantiate()'
         - julia --project=docs/ docs/make.jl
       after_success: skip
+notifications:
+  email: false
+after_success:
+  # push coverage results to Codecov
+  - julia -e 'using Pkg; pkg"add Coverage"; using Coverage; Codecov.submit(Codecov.process_folder())'

Project.toml

@@ -17,7 +17,7 @@ DocStringExtensions = "^0.8"
 IterativeSolvers = "^0.8"
 LinearMaps = "^2.6"
 MLJModelInterface = "^0.3"
-Optim = "^0.20,^0.21"
+Optim = "0.20,0.21,1,1.1"
 Parameters = "^0.12"
 julia = "^1"