Abandon 1.6, checkout v4 (#23)

* Abandon 1.6, checkout v4

* Compat Julia 1.9

.github/workflows/Documentation.yml

@@ -16,7 +16,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@latest
         with:
           version: '1'

.github/workflows/ci.yml

@@ -23,10 +23,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        version: ['1.6', '1', 'nightly']
+        version: ['1', 'nightly']
         os: [ubuntu-latest, windows-latest, macOS-latest]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 #     - name: "Set up Julia"
       - uses: julia-actions/setup-julia@latest
         with:

.github/workflows/clean.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout gh-pages branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: gh-pages
       - name: Delete preview and history + push changes

Project.toml

@@ -14,4 +14,4 @@ FFTW = "1"
 PortAudio = "1.1"
 Requires = "1"
 SignalBase = "0.1"
-julia = "1.6"
+julia = "1.9"

README.md

@@ -130,7 +130,7 @@ See the documentation for example use.
 
 ## Compatibility
 
-Tested with Julia ≥ 1.6.
+Tested with Julia ≥ 1.9.
 
 
 ## Caveats