Fix Flow errors and revert upgrade

Author: kitten

package.json

@@ -74,7 +74,7 @@
     "babel-jest": "^26.6.3",
     "babel-plugin-macros": "^3.0.1",
     "codegen.macro": "^4.1.0",
-    "flow-bin": "^0.145.0",
+    "flow-bin": "0.123.0",
     "globby": "^11.0.2",
     "husky": "^4.2.5",
     "jest": "^26.6.3",

src/components/Highlight.js

@@ -31,7 +31,7 @@ class Highlight extends Component<Props, *> {
   prevLanguage: Language | void;
   themeDict: ThemeDict | void;
 
-  getThemeDict = (props: Props) => {
+  getThemeDict = (props: Props): ThemeDict | void => {
     if (
       this.themeDict !== undefined &&
       props.theme === this.prevTheme &&
@@ -128,21 +128,26 @@ class Highlight extends Component<Props, *> {
     code: string,
     grammar: PrismGrammar,
     language: Language
-  ): Array<PrismToken> => {
+  ): Array<PrismToken | string> => {
     const env = {
       code,
       grammar,
       language,
+      tokens: [],
     };
 
     Prism.hooks.run("before-tokenize", env);
-    env.tokens = Prism.tokenize(env.code, env.grammar, env.language);
+    const tokens = (env.tokens = Prism.tokenize(
+      env.code,
+      env.grammar,
+      env.language
+    ));
     Prism.hooks.run("after-tokenize", env);
 
-    return env.tokens;
+    return tokens;
   };
 
-  render() {
+  render(): Node {
     const { Prism, language, code, children } = this.props;
 
     const themeDict = this.getThemeDict(this.props);

src/vendor/prism/prism-core.js

@@ -184,7 +184,9 @@ var Prism = (function () {
         grammar: grammar,
         language: language,
       };
+      _.hooks.run("before-tokenize", env);
       env.tokens = _.tokenize(env.code, env.grammar);
+      _.hooks.run("after-tokenize", env);
       return Token.stringify(_.util.encode(env.tokens), env.language);
     },
 

yarn.lock

@@ -2465,10 +2465,10 @@ find-versions@^4.0.0:
   dependencies:
     semver-regex "^3.1.2"
 
-flow-bin@^0.145.0:
-  version "0.145.0"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.145.0.tgz#922f7c3568caaa5eb64621ec536deb56b24d1795"
-  integrity sha512-+9fi9BMxRBtSWC1x0hWggWTb8Vih+AC7wyvLAX5wR1m6u2lF2HLtixXqy2GX8bWgaynSEJR5lmPxYYC4wMI8cA==
+flow-bin@0.123.0:
+  version "0.123.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.123.0.tgz#7ba61a0b8775928cf4943ccf78eed2b1b05f7b3a"
+  integrity sha512-Ylcf8YDIM/KrqtxkPuq+f8O+6sdYA2Nuz5f+sWHlp539DatZz3YMcsO1EiXaf1C11HJgpT/3YGYe7xZ9/UZmvQ==
 
 for-in@^1.0.2:
   version "1.0.2"