Update CI configs to v0.3.4

Update lint scripts and CI configs.

.github/workflows/tidy-check.yaml

@@ -0,0 +1,37 @@
+#
+# DO NOT EDIT THIS FILE
+#
+# It is automatically copied from https://github.com/pion/.goassets repository.
+# If this repository should have package specific CI config,
+# remove the repository name from .goassets/.github/workflows/assets-sync.yml.
+#
+# If you want to update the shared CI config, send a PR to
+# https://github.com/pion/.goassets instead of this repository.
+#
+
+name: Go mod tidy
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+jobs:
+  Check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: Setup Go
+        uses: actions/setup-go@v2
+      - name: check
+        run: |
+          go mod download
+          go mod tidy
+          if ! git diff --exit-code
+          then
+            echo "Not go mod tidied"
+            exit 1
+          fi

.travis.yml

@@ -113,30 +113,30 @@ _test_wasm_job: &test_wasm_job
 jobs:
   include:
     - <<: *lint_job
-      name: Lint 1.14
-      go: 1.14
-    - <<: *test_job
-      name: Test 1.13
-      go: 1.13
+      name: Lint 1.15
+      go: 1.15
     - <<: *test_job
       name: Test 1.14
       go: 1.14
-    - <<: *test_i386_job
-      name: Test i386 1.13
-      env: GO_VERSION=1.13
-      go: 1.14  # Go version for host environment only for `go list`.
-                # All tests are done on the version specified by GO_VERSION.
+    - <<: *test_job
+      name: Test 1.15
+      go: 1.15
     - <<: *test_i386_job
       name: Test i386 1.14
       env: GO_VERSION=1.14
-      go: 1.14  # Go version for host environment only for `go list`.
+      go: 1.15  # Go version for host environment only for `go list`.
+                # All tests are done on the version specified by GO_VERSION.
+    - <<: *test_i386_job
+      name: Test i386 1.15
+      env: GO_VERSION=1.15
+      go: 1.15  # Go version for host environment only for `go list`.
                 # All tests are done on the version specified by GO_VERSION.
-    - <<: *test_wasm_job
-      name: Test WASM 1.13
-      env: GO_VERSION=1.13
     - <<: *test_wasm_job
       name: Test WASM 1.14
       env: GO_VERSION=1.14
+    - <<: *test_wasm_job
+      name: Test WASM 1.15
+      env: GO_VERSION=1.15
 
 notifications:
   email: false