Bump nltk from 3.4 to 3.4.5 in /tf1.12.0-eager#6

dependabot[bot] wants to merge 1 commit intomasterEternalFeather/Transformer-in-generating-dialogue:masterfrom

dependabot/pip/tf1.12.0-eager/nltk-3.4.5EternalFeather/Transformer-in-generating-dialogue:dependabot/pip/tf1.12.0-eager/nltk-3.4.5Copy head branch name to clipboard