Uprade TypeScript from 3.2.2 to 3.6.4

package.json

@@ -26,6 +26,6 @@
     "tslint": "^5.11.0",
     "tslint-language-service": "^0.9.9",
     "tslint-no-unused": "^0.2.0-alpha.1",
-    "typescript": "^3.2.2"
+    "typescript": "^3.6.4"
   }
 }

src/helpers/index.ts

@@ -1,13 +1,11 @@
-const tuple = <T extends Array<unknown>>(...args: T): T => args;
-
 // `Object.keys` does not return the keys as string literals, only strings. Use this helper as a
 // workaround. https://github.com/Microsoft/TypeScript/pull/12253#issuecomment-263132208
 const keys = <O extends object>(obj: O) => Object.keys(obj) as Array<keyof O>;
 
 // `Object.entries` is ES2017, but this lib only supports ES2015 at runtime, so we must define our
 // own version.
 const entries = <K extends string, V>(obj: Record<K, V>) =>
-    keys(obj).map(key => tuple(key, obj[key]));
+    keys(obj).map(key => [key, obj[key]] as const);
 const fromEntries = <K extends string, V>(arr: Array<[K, V]>) =>
     // `Object.assign` is poorly typed: it returns `any` when spreading. Use cast to workaround.
     Object.assign({}, ...arr.map(([k, v]) => ({ [k]: v }))) as Record<K, V>;

src/index.ts

@@ -62,18 +62,25 @@ export type ImgixUrlQueryParams = {
     faceindex?: number;
     facepad?: number;
 };
-
-const pickTrueInObject = <K extends string>(obj: Record<K, boolean>): Partial<Record<K, true>> =>
-    pickBy(obj, (_key, value): value is true => value);
+// TODO: remove cast and either make all functions allow partial, or all non-partial.
+// const pickTrueInObject = <K extends string>(obj: Record<K, boolean>) =>
+const pickTrueInObject = <K extends string>(
+    obj: Partial<Record<K, boolean>>,
+): Partial<Record<K, true>> =>
+    pickBy(obj as Record<K, boolean>, (_key, value): value is true => value);
 const pickTrueObjectKeys = pipe(
     pickTrueInObject,
-    // tslint:disable-next-line no-unbound-method
-    Object.keys,
+    // This function has an overload which breaks type inference. See:
+    // https://github.com/Microsoft/TypeScript/issues/29904#issuecomment-471105473. We workaround this
+    // by wrapping the function.
+    obj => Object.keys(obj),
 );
 const undefinedIfEmptyString = (str: string): string | undefined => (str === '' ? undefined : str);
 const joinWithComma = (strs: string[]) => strs.join(',');
 const serializeImgixUrlQueryParamListValue = pipe(
     pickTrueObjectKeys,
+    // Needed to workaround https://github.com/microsoft/TypeScript/issues/29904#issuecomment-543785534
+    value => value,
     joinWithComma,
     undefinedIfEmptyString,
 );

yarn.lock

@@ -319,10 +319,10 @@ tsutils@^2.27.2:
   dependencies:
     tslib "^1.8.1"
 
-typescript@^3.2.2:
-  version "3.2.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.2.2.tgz#fe8101c46aa123f8353523ebdcf5730c2ae493e5"
-  integrity sha512-VCj5UiSyHBjwfYacmDuc/NOk4QQixbE+Wn7MFJuS0nRuPQbof132Pw4u53dm264O8LPc2MVsc7RJNml5szurkg==
+typescript@^3.6.4:
+  version "3.6.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.6.4.tgz#b18752bb3792bc1a0281335f7f6ebf1bbfc5b91d"
+  integrity sha512-unoCll1+l+YK4i4F8f22TaNVPRHcD9PA3yCuZ8g5e0qGqlVlJ/8FSateOLLSagn+Yg5+ZwuPkL8LFUc0Jcvksg==
 
 url-transformers@^0.0.5:
   version "0.0.5"