fix lint errors

src/env.ts

@@ -16,7 +16,7 @@ async function from_file(path: string): Promise<Ok<string>> {
   log.debug('Read a key from a file')
   log.trace('Path :', path)
 
-  let content = await get_file_content(path)
+  const content = await get_file_content(path)
   if (!content.ok) return content
 
   content.data = content.data.trim()

src/parsing.ts

@@ -19,12 +19,12 @@ export async function object<S extends yup.Maybe<yup.AnyObject>>(
   for (const key in schema.fields) {
     const sub_key = base_name + key.toUpperCase()
 
-    const sub_scheme = schema.fields[key]
+    const sub_scheme = schema.fields[key] as yup.AnySchema
     let value: Ok<unknown>
 
-    // TODO : If array, add a transform
-    if (sub_scheme.describe().type === 'object') {
-      value = await object(sub_scheme, sub_key)
+    const type = sub_scheme.describe().type
+    if (type === 'object') {
+      value = await object(sub_scheme as yup.ObjectSchema<yup.Maybe<yup.AnyObject>>, sub_key)
     } else {
       value = await generic(sub_scheme, sub_key)
     }