Add browser support

What's Changed

• fix(sdk/nftSDKFunctions): fix Buffer and remove file reading @kacper-koza-arianelabs in #69
• (sdk/rarity&local-validation): adjust function to Blob input @kacper-koza-arianelabs in #71
• fix(sdk/upload-service): fix Blob for browser @kacper-koza-arianelabs in #72
• fix(sdk/csv-parser): replace csv-parser with papaparse @kacper-koza-arianelabs in #73
• update browser-related functions in docs with examples @kacper-koza-arianelabs in #76
• fix(sdk): add browser support @kacper-koza-arianelabs in #77

Full Changelog: v3.1.2...v3.1.3