chore: try to please the helm linter

Signed-off-by: Tyler Gillson <tyler.gillson@gmail.com>

hack/update-versions.sh

@@ -43,7 +43,6 @@ function updateValues {
     truncate -s-1 chart/validator/values.yaml
     echo "Updated values.yaml for validator-plugin-$plugin @ v$version."
   done
-  truncate -s-1 chart/validator/values.yaml
 }
 
 export AWS_VERSION=$(latestRelease validator-labs/validator-plugin-aws)

lintconf.yaml

@@ -0,0 +1,42 @@
+# source: https://github.com/helm/chart-testing/blob/main/etc/lintconf.yaml
+rules:
+  braces:
+    min-spaces-inside: 0
+    max-spaces-inside: 0
+    min-spaces-inside-empty: -1
+    max-spaces-inside-empty: -1
+  brackets:
+    min-spaces-inside: 0
+    max-spaces-inside: 0
+    min-spaces-inside-empty: -1
+    max-spaces-inside-empty: -1
+  colons:
+    max-spaces-before: 0
+    max-spaces-after: 1
+  commas:
+    max-spaces-before: 0
+    min-spaces-after: 1
+    max-spaces-after: 1
+  comments:
+    require-starting-space: true
+    min-spaces-from-content: 2
+  document-end: disable
+  document-start: disable           # No --- to start a file
+  empty-lines:
+    max: 2
+    max-start: 0
+    max-end: 0
+  hyphens:
+    max-spaces-after: 1
+  indentation:
+    spaces: consistent
+    indent-sequences: whatever      # - list indentation will handle both indentation and without
+    check-multi-line-strings: false
+  key-duplicates: enable
+  line-length: disable              # Lines can be any length
+  new-line-at-end-of-file: enable
+  new-lines:
+    type: unix
+  trailing-spaces: disable
+  truthy:
+    level: warning