bump min julia = 1.6 in ci and project

Author: ablaom

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.0'
+          - '1.6'
           - '1'
         os:
           - ubuntu-latest

Project.toml

@@ -12,7 +12,7 @@ MLJModelInterface = "e80e1ace-859a-464e-9ed9-23947d8ae3ea"
 Clustering = "0.14"
 Distances = "0.9, 0.10"
 MLJModelInterface = "1.4"
-julia = "1"
+julia = "1.6"
 
 [extras]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"